Why Not to Change Your Car's Muffler

Muffler explained and why not to change or modify the one that comes with your car's exhaust system. Why not to change your car's muffler with Scotty Kilmer. Muffler modifications and aftermarket mufflers. Stock muffler vs straight pipe vs muffler delete, which is better? The pros and cons to modifying your exhaust system and muffler. There are advantages to changing a stock muffler, but also a lot of downsides. If you haven't made any major engine modifications to your car and don't plan on reprogramming the car's computer, changing the muffler on your exhaust system isn't a smart idea. DIY car repair with Scotty Kilmer, an auto mechanic for the last 50 years.
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This is the people's automotive channel! Learn how to fix your car and how it works. Get a chance to show off your own car on Sundays. Or show off your own car mod on Wednesdays. Tool giveaways every Monday to help you with your own car projects. Or enter your own car to compete in the Car vs Car contest every Thursday. We have a new video every day! I've been an auto mechanic for the past 50 years and I'm here to share my knowledge with you.
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[@scottykilmer]

⬇️Scotty’s Top DIY Tools: 1. Bluetooth Scan Tool: amzn.to/2nfvmaD 2. Cheap Scan Tool: amzn.to/2D8Tvae 3. Professional Socket Set: amzn.to/2Bzmccg 4. Wrench Set: amzn.to/2kmBaOU 5. No Charging Required Car Jump Starter: amzn.to/2CthnUU 6. Battery Pack Car Jump Starter: amzn.to/2nrc6qR 🛠Check out my Garage to see what I use every day and highly recommend: www.amazon.com/shop/scottykilmer ► Subscribe and hit the notification bell for all new videos: kzbin.info Scotty on Social: Facebook ► facebook.com/scottymechanic/ Instagram ► instagram.com/scotty_the_mechanic/ Twitter ► twitter.com/Scottymechanic?lang=en

[@user-yv7zs7ne7x]

luke saylor I agree

[@dominicanbiker]

Scotty Kilmer what if someone stole your whole exhaust system and I wanted to put a new system with flowmaster 40

[@tommyw7]

Scotty, please bring back the "1, 2, 3, 4, fire up your engine" intro at the beginning of each video!!!!

[@snider2588]

Scotty i appreciate the link to Amazon about all the tools you use

[@jonathansanchez6952]

Scotty Kilmer thats why you tune the car DUH

[@scorpionwins6378]

Scotty's wife's Lexus= 42db Scotty's motorcycle= 110db Scotty's speaking voice= 190db

[@low87dawg86]

Mistah J he needs a muffler

[@anthonyr.hodgson9988]

Lol, remember non offensive comment.

[@thefishingplace6071]

More like 210db

[@KevinWilliams19723]

See, without the Muffler, he's loud and doesn't run right :D

[@lees.4084]

Mistah J Now that's funny...

[@craterrr]

I was really thinking on putting a performance exhaust system on my car, and then I watched this video. Still gonna do it

[@user-ti3sg9un9m]

😂😂😂

[@mkb_344]

Agreed

[@kotaman232]

Just tune it like he said.

[@flute136]

@@kotaman232 tune it HOW though?

[@itz_evil1653]

@@flute136 get it tuning by a tuner

[@bpheta]

Thanks Scotty... im going to remove my muffler now

[@markchatten9484]

🤣👍

[@wowed1659]

Same😂

[@zefiraskaunas395]

Me 3

[@williamguenther]

Exactly what I was thinking

[@algretatum5045]

Facts 😂😂😂

[@Jezzz9]

With every mod I research or stumble across… this guy is always there to tell us not to 😂 He probably has a point a lot of the time but what a buzz kill!

[@benc2324]

He has absolutely no idea what he is talking about.

[@felixtavarez7769]

He really is there every time I search a mod.

[@heberaviles932]

He’s just telling you to do it properly

[@tym6218]

One acid trip in the 60s and Scotty has been riding the wave ever since

[@coydog7902]

C a t c h t h e w a v e

[@davkhr]

ty m LMAO

[@aaronfregoso8845]

😂

[@davkhr]

ty m acid was way more potent back in the 60s

[@duarte9448]

ty m lmao

[@lemixxradiolemix871]

Rev your Engines, but quietly..

[@elijahcormier5239]

LemixXRadio Lemix Rev them up? Or down?

[@omegarex909]

Lol

[@LegendStormcrow]

Rev your Engines, unless you drive a ricer bumblebee.

[@tjjavier]

Hahahaha!!! 😂

[@SHOTS-FIRED]

Dont forget to quietly ring that bell🔕

[@DanPellegrino486]

Imagine living near this guy? "Yeah honey, he's outside yelling at the camera again. I don't know he's revving up a motorcycle now? He's yelling more and waving his arms.

[@NipponNostalgicTV]

HAHAHAHAHA

[@jordanbuscema2719]

YES

[@abexity4982]

🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣

[@jenw6009]

Lmao

[@MFP2241]

Yeah he should get a muffler for that mouth of his... or a tune.

[@chris5306]

Some people seem to think Scotty is completely against modding which I don't believe is the case I believe he is just trying to inform people that modding cars does have risks and draw backs that not everyone is aware of

[@glasscannon4723]

Ppl have their egos far up their arse lmao

[@MorebeatsTV]

We are fully aware we just don’t give af. It’s simple just tune your ecu, which is one of the main mods people do anyway

[@senorbonbon]

@@MorebeatsTV tune your ecu ? explain?

[@colecontos5001]

When Scotty said piping your mufflers makes your car run poorly. You can tune for the new exhaust, so that it potentially can run even better than stock.

[@senorbonbon]

@@colecontos5001 so I would need a tune for my catback exhuast I’m going to purchase soon?

[@Sakezaf]

No muffler: 110dB, Scotty talking: OVER 9000!

[@MohdAzylee]

Levente Fazekas hhahah hes good

[@BOSKILLZX]

Loooooool

[@onemanarmyEST]

It must've taken a team of engineers to create the voice of Scotty Kilmer, he runs his mouth very loudly yet efficiently.

[@tank0military]

Levente Fazekas 8753 14th565887800997 poo o877422 wer timeuo know c CVS l

[@dmerced257]

haaa haaa!!!!!!!!!!!

[@tyjones6568]

This guy doesn’t want us to do anything with our cars 😂

[@robertoayala809]

🤣

[@johnharriel4485]

Rip your cats out man, they just the governments excuse to screw up gas flow. Do it man!

[@jogmas12]

Ty Jones dude, just buy an old car!

[@s.s.divakar7911]

This guy says correctly

[@Munted1.4L]

I mean, he does make it clear that we need to get a tune. That goes for any mod that relates to fuel or air. Intakes, exhaust and such all need a tune afterwards to get the most out of the particular mod.

[@muaythai193]

You can change the exhaust without making it louder. For example install a true dual no crossover exhaust on a V8, and install two separate cats and two separate mufflers. That way your car didn’t get louder but it sounds much nicer because of the uneven firing V8 shining and showing it’s real character. 👌

[@austinbishop7430]

I approve as a V8 owner. Most Ford come with true dual with H pipe.

[@muaythai193]

@@austinbishop7430 for sound AND performance, h-pipe is the way to go. 👍

[@robmen1402]

I mean his main concern isn't the sound but more that he claims that it ends up making your car actually run worse, not better.

[@muaythai193]

@@robmen1402 That’s incorrect though.

[@mcintosh.motors]

Really depends on the car.. most newish cars’ ECU can adapt to air flow changes such as a full catback exhaust. Changing out cats though can be a different story

[@jaskajokunen3716]

Removing cat usually causes the car to run slightly richer but not much. The rear o2 sensor doesn't really affect it that much.

[@nelsonrodriguez2522]

Watched this video yesterday. Installed a muffler today.

[@zomclownttv]

Lmao

[@tylersk8s51]

Bouta install one aswell😂

[@lrvr21]

as long as scotty doesnt know

[@sarthakmohapatra3738]

Idiots percieve the world in an absurd way.

[@fredcole2683]

I watched it after doing mine yesterday lol

[@mendocinorider]

Rev up your stock mufflers!!

[@wilfishy4381]

Haha

[@derrekspeck3417]

Hahaha

[@christrealg934]

🤣🤣🤣

[@imoral2348]

Javier Roman 😂😂😂

[@956HOUSE]

💀💀💀💀💀💀💀😂😂😂😂

[@0311tard]

I also had a catback straight pipe. It never ran bad, if anything it felt like it ran better. I felt a better throttle response and everything. My mpg never went down, never lost any power, nothing. Removing mufflers doesn’t do anything. But removing the cats in most cars does.

[@davethecow445]

I really appreciate the heads up! Im removing my muffler now!

[@mariofalz]

Next video: Why not to buy a car

[@richardwhitaker4148]

mariofalz I'm dead. That is tooo funnyyyyy 😆😆😆🤣💀💀💀💀

[@yamaha94O]

XD

[@banker7308]

Next video why not to put gass in your car

[@JH-jm8ib]

Next video. Why not to piss off a police officer. Don’t speed and don’t mod your car illegally

[@banker7308]

Why not to clean your car 😂😂😂

[@888TopGear888]

And then theres Scotty, who talks at 130 decibels.

[@raymondlualhati3978]

Lol

[@SSGSPEEDMAN]

888TopGear888 hahahhahahahhaahahah love it

[@roycejohnson8189]

888TopGear888 " Screaming- "REV YER ENGINES!!!!!"

[@2R1V3R]

CryptoHick 😂😂😂😂

[@sgthoon7780]

😂😂

[@eliforbes4842]

The ending where he rings the bell is the best part of any of his videos🤣🤣👌literally perfect, damn minty I tell ya😂😂😂😂

[@TheRugghead]

If Scotty couldn't talk me out of it, no one can

[@Angel-dn9sm]

Pretty much he is saying tune car after exhaust....

[@SI0AX]

That is the perfect advice. Tune your car after any mod that changes engine performance. Even a damn intake. You otherwise wont get any benefit from it, and like he said, it will most likely make the engine run bad. I once installed a 3" intake when stock was 2.75". The check engine light came on with 2 codes. 1 code was about running too rich, the other code was about running to lean. So the tune was pretty much completely screwed up. Since I did my research, I had the ECU tuning software *before* I even changed the intake, so I was able to calibrate the MAF sensor and adjust the A/F ratio.

[@konnj]

Opening the exhaust will decrease engine power loss at the exhaust stroke and sends that lost torque to the crankshaft. This will not really change how the engine operates just makes it easier for it to work so less power is lost. 99% of modern engines have self-adjusting ECU set to certain parameters mostly based on airflow, it's not until you change the AFR mixtures or timing that you need to tune the engine, not that you can't get any more power out of the engine with a tune however, factories tend to mass produce engines and ECU's, not really tuning them for each individual engine. Making it easier for the engine to work, like putting on a less restrictive air-intake or less restrictive exhaust does not generally require tuning because engines are tuned on a engine dyno without any air or exhaust restriction.

[@letsroll2463]

It all depends on the car, it is true if you want the full benefit of the mod that u will need a tune to go along with it. However, not all cars are universal I was able to get 40whp on full bolt ons with no tune NO troubleshoot codes. The video and commenters is vaguely describing mods as a whole, but after that 40whp turned into nearly more than double with a tune cycling through after awhile. Tunes do benefit turbo cars a lot though increasing the turbos output to the maximum psi factory limits on stock parts, but may risk the engine depending on the car. I do not even care about loudness so he is pretty much generalizing as i prefer to have it on the low, which is why i was kind of hesitant in changing the headers cause it does increase it ten-fold. However, with the mods i do get faster times and/or better gas mileage depending on how i drive it.

[@bisterkding9249]

Bjorn, that's not true. There are numerous forums full of people warning that they have actually lost performance after installing a simple performance-oriented cold air intake. They were able to trace the problem back to the engine's air sensors- the wider intake ducts changed the density of and rate at which the air flowed into the engine, throwing off the air/fuel ratio.

[@Adam2050]

Its a rant.

[@austinament7647]

This guy has me convinced he’s all about stock cars (which isn’t a bad thing)

[@hunterskeens2642]

Changed my muffler bout 7 months ago. Still no check engine light. Still runs fine. And sounds great. Plus my O2 sensors are before my muffler so its not messing up anything with the computer cause its stock until the muffler

[@BeefyWaffle]

I hear you loud and clear Scotty **saws off muffler**

[@adamlummis7519]

Oh my god I died when you said this 😂😂😂💀

[@dontknow2419]

spends 700 on a magnaflow

[@Nigriff]

Scotty is louder than my straight pipes

[@King88_8]

Scotty, youre loud, you need a muffler...😆😆😆

[@GianniEndo]

King that's hilarious!

[@mysticreign3057]

King Yes!

[@horseplop9]

lol that's funny

[@Bandit-Darville]

No, because he's tuned to perfection!

[@janiyanethmaweerasinghe512]

Stock muffler was removed from him, free flow pipe isn't programmed well that's why it's revving Soo much😂😂

[@Mel1n1]

I watched 14 seconds of this video and now I'm going out and straight piping every vehicle I own. Thanks Scotty for convincing me!

[@AlainHubert]

According to this guy, engineers design perfect cars and we shouldn't do any mods to them. What he neglects to mention is that engineers are also restricted by governmental restrictive emissions laws and rules that don't allow engines to breathe freely. That's exactly what happened in the mid-seventies when engines suddenly lost hundreds of horsepower for the same size. It's like for a human to go biking with a scuba diving mask on.

[@rs72098]

I disagree. Even if that were the case, the engineers still designed the system around current stock exhausts. So modifying them doesn't improve much. You're better off putting an entire modified racing engine if you want engineers who are solely after horsepower. Most modern vehicles are designed around fuel economy. It's more like a human going diving in water with a scuba mask on.

[@Monkeyseemonkey79]

I wish Scotty would speak up. I can barely hear him.

[@aaronarevalo6512]

dead lol

[@naphtaliobanor1454]

Maybe if Scotty removes his vocal muffler and straight pipes his vocal chords, you can hear him better

[@goosebee]

Lmao 🤣🤣

[@saltycade9063]

Tom Wetz it’s a joke...

[@EZ4U2Say11]

Take your muffler off then you can hear him

[@johnponce8759]

Check engine light should not appear as long as the catalac converter isnt messed with

[@TheSMARTREY]

i removed mine and no check engine lights comes up, had my catback custom made by a philippine racing team. so it's not always the case

[@renechimborazo7166]

@Camaro SS what about when you need to pass inspection

[@zolttech3907]

rene chimborazo it won’t pass

[@buschg7106]

Yep

[@Officertack]

Bullshit. it comes on if you change the air intake as well

[@barrybebenek8691]

The anti-pollution system graphic is priceless. 😂🇨🇦

[@jesusislord4060]

Emission control is such a joke. 😔

[@sarahendrix3132]

Really cool you had a history lesson about the Reeves Bros. from Columbus, IN being the first to patent the muffler system in 1897! Indiana is my home state and I didn't know that so thanks for sharing!

[@_AlejandroGonzalez_]

Was looking for a louder exhaust for my truck, found this video instead. Still looking for a louder exhaust

[@jamesslossar3865]

Alejandro Gonzalez what exhaust did you end up going with

[@zachwagner1517]

Alejandro Gonzalez I got a flow master on mine

[@jeezus1288]

I’m with you brother 😂

[@tonyboyd3783]

Alejandro Gonzalez 😂😂😂😂😂

[@hydeist0666]

Im going for a greddy chambered muffler. Is that a good obe for bone stock engine?

[@autohelix]

Too late I put a Cat-Back exhaust on everything I own.

[@landongarner9643]

Ford ST same.

[@soberstoner1152]

Too bad you own a Ford

[@landongarner9643]

No Name I don't own a Ford.

[@autohelix]

No Name Too bad you don't.

[@sourwords1808]

Ford ST not all of us are kids.

[@captainkangaroo4301]

My muffler has a hole in it and according to Scotty I shouldn’t change the muffler so I guess my only alternative is to cram his pinhead into the hole and snap it off. Thanks for the advice Scotty.

[@kestrel0389]

I was thinking of doing it for better sound but now I know there’s a slight power gain; I’m definitely doing it!

[@billyfreeman5803]

Paused video to comment before watching. Let me guess..... Scotty does his thing where he goes "the engineers of the vehicle knew what they were doing" UPDATE: I was right

[@WeekendWarrior604]

Nailed it! 😂👍

[@reaganharder1480]

The problem with that argument is that the engineers who designed the thing were concerning themselves with a lot of factors many car guys just don't car about. Like being quiet, for example.

[@jesusislord4060]

@@reaganharder1480 True. The engineers had to design the exhaust system with emissions in mind but where I live has no emission laws so it's okay to remove all this restricting crap.

[@johnchandler1687]

When you go to free flowing exhaust you may gain top end horsepower, but you lose torque in lower RPM range. Not a concern with a hotrod, but if you really use your truck for working and hauling torque is more important. Also, a builder of performance engines tried changing the valve angles. Found that going from standard 45 degree to 35 degree lost approximately 5% of horsepower, but gained over 10% torque. Torque is what makes vehicles go. More horses at 4000 RPM doesn't do you any good in normal driving unless you're passing some one. If you just want loud install cutouts and go whole hog.

[@tluva1020]

Let me guess, you watched it, and then edited it..... Yep, I was right

[@TheJoe999Man]

Scotty just burned ricer kids low key

[@xXMetalforever1994Xx]

Sir Brellin this is only for "modern" cars, ricers often don't drive "modern" cars.

[@JeepTJWheelin]

Sir Brellin Well someone had to. Ricers with farts cans should be taken off the road permanently.

[@mean3g161]

Sorry but a new exhaust system is a performance mod not a cosmetic enhancement.

[@GearHeadSX]

2JZ FTW its actually both

[@alphatrion100]

Modern cars meaning 90's and newer. Carburators started disapearing in the 80's

[@noahleonhardtproductions2808]

Mr Scotty, the computer programming is called tuning and a lot of the kids on the streets with the Japanese cars tune their cars to run just right and frankly pretty fast and loud

[@kocaine_03]

Scotty complains about every modification. He should just drive a stock Prius 😂

[@baranUtube]

High Diamond exactly, this fckn guy.

[@kocaine_03]

BooostedGTI 😂😂

[@ej_tech]

He drives an old Celica. A Prius has added complexity. Complexity he doesn't want to deal with.

[@dirtycommtroop]

Scotty is absolutely right though. A lot of people put in new intakes and mufflers but they don't get it tuned. You need to tune it!

[@nashvilleoutlaw]

Derek K i put a flowmaster on my truck 15 years ago and never got it tuned. I did get an extra 2mpg better fuel economy though.

[@garymason2815]

Most ECU figure out the new airflow pretty quick and compensate for it loud pipes save lives

[@missingremote4388]

Need at least a Rez ( resonator muffler )

[@eduardodiaz5762]

It does save lives, better acceleration response as well to Swerve the haters 😁

[@inbredjesus9188]

@Philip Turner my muffler fell off, I get the funny type of attention which I find funny

[@Levi-qb2uf]

@Philip Turner you say that like you were never young

[@ariskaitamialastakagela9187]

Yes..... actually new exhausts like that give you more horses on higher rpm by taking those horses from lower or the opposite,so scotty is wrong

[@armiestone]

Decibel meter reads "ERROR" when measuring Scotty's voice!

[@bodyshotjake7475]

This may have been true with older vehicles and may be true for some newer vehicles. However, there is plenty of dyno prof that the stock ECU tunes can still compensate and will absolutely make more power with a free flowing exhaust. Will it make more power with a tune? Of course.

[@DazTheMe]

Legend has it that Scotty tried to measure how many decibels his intro was and the sound metre just showed "Error"

[@cullenmcnamara5518]

Watched this video yesterday, today took my mufflers off car sounds fantastic runs better no engine lights 👨🏼‍🔧

[@silverrain99205]

Mechanik

[@jesusislord4060]

Honestly its only okay to remove your muffler if you tune your car to compensate for more air flow or else like Scotty said it will run worse as there is less fuel than air.

[@SpookyDaScary59]

@@jesusislord4060 recommended for 90+ 110 octane cars unless you want to smell like rotten eggs everywhere you pull up

[@jesusislord4060]

@@SpookyDaScary59 Wdym? Why?

[@SpookyDaScary59]

@@jesusislord4060 high octane burns off almost 100% so you won’t need muffler or cat, but my Ford will stink the place up on unleaded

[@toxichudsoup1644]

From what I've heard mechanics say, as long as you don't change anything from the Catty and upwards towards the engine, anything like a catback exhaust won't change anything but the sound

[@CiscoCheang]

I put a Borla axle back on my ND Miata a year ago. Love it.

[@honk3x]

This guy is that grandpa that tells you to keep your car all stock straight from the dealership 🤦🏻‍♂️😂

[@simdoran8516]

A car is actually worth less when you modify it from original spec.

[@honk3x]

Sim Doran yeah if you return it to the dealership.

[@Sloimer]

@@simdoran8516 And?

[@mrjpz]

@@simdoran8516 that's not true at all actually havent you heard of 100k supras?

[@fordshuler1525]

@@simdoran8516 depends on what it is, if you bulletproof a 6.0L it'll sell for more because you've fixed all the issues that it had at original spec 👽

[@sfg77dfjuhfg89]

I like the throaty sound and smoother acceleration in power of my Magnaflow performance exhaust system.

[@systemofadownsyndrome6177]

Meanwhile, I have a cheap aftermarket muffler on my grocery getter 03 malibu 🤣. Believe it or not it sounds godly and has a nice sound to it. Gives her a nice personality. . [ it's a sfi 3100 v6] .

[@penguinjoe1961]

C'mon Scotty! You know as well as the rest of us that one of the things people have to do with their cars when modifying the intake or exhaust of their car these days is to retune it with a computer. That makes the A/F ratio correct with the new freer flowing systems. It is standard operating procedure these days. That trumps re-jetting a carb any day. I know - I've had to reject carbs after bolting a set of headers, 360 manifold and a 650 Holley double-pumper on that old 350 chevy engine 45 years ago.

[@robmen1402]

Right, I was going to say that, but you did so I don't have to bother. Most people throw the cold air intake and performance exhaust and don't do a tune. If you don't in most cases I'm sure it will be ok. But it would be the optimal thing to do.

[@gmugrumbach]

The sobbing girl cartoon for the "sensitive" system hahahaha! Oh Scotty.

[@Godzukidan]

How are they going to hear us rev our engine's with stock mufflers. 🚘🙉

[@dandearman2871]

I think watching the tires smoke is more impressive than listening to the engine rev.

[@universalmind7007]

Exactly lol I just installed a exhaust system on my mazda 6 and I think it drives more aggressive

[@lordcxm_7th747]

😂😂😂😂 I’m crying 😭

[@lordcxm_7th747]

Straight pipe lifestyle 😁

[@streetcargarage5743]

Godzukidan 😎😎 I agree

[@yurtledturtle6423]

Thank you scotty for informing me how to get pops and bangs out of my car ❤

[@Chios82100]

You can modify whatever you want as long as you have the car tuned to your modifications. I have a Nissan Juke Nismo RS pushing 403 HP at 26psi no check engine lights, runs great, if I drive normally and when I turn down the boost to 16psi for normal driving I still get pretty good gas mileage. It's all about having your car professionally tuned by people that know what they are doing... And as for the sound, I have no catalytic converters I have a nice Magnaflow resonator and Magnaflow dual port exhaust they do a great job of muffling the sound, at idle it doesn't sound any louder then it did before with the Nissan OEM Nismo exhaust system.

[@pyroaficionado867]

Now the teenage honda drivers are TRIGGEREDDDDDD

[@claudedottin1312]

Pyro Aficionado lol mine is tuned

[@DeadlyBrianX]

Pyro Aficionado See I drive an accord with VTEC stickers and vortex fins on top. This was my next plan but poppa scotty always there for us.

[@claudedottin1312]

DeadlyBrianX if you know what vortex generators work they may or may not work on your car to work with a spoiler and depending on the downforce generated on your car

[@DeadlyBrianX]

Claude Dottin No I meant changing the muffler was my next plan. My Ricer build is what I told you and it works so well.

[@Hikojiro]

Why Honda?

[@madmotorrepair1748]

Loud Pipes Saves Lives

[@brianshaggy]

Mad Motor Repair only for motorcycles, can't be said about cars when you're on a steel cage and you're not almost invisible to old grannies and texting teenagers on thier 3000lbs bullet vehicles, the only reason a car should be loud is because it's fast, i hate seeing 200hp cars sound like uther garbage

[@suckmydingledong]

BrianShaggy074 you know you can barely hear them until they pass you anyways

[@Chubbycat747]

There are no scientific studies to back up your claim. Loud pipes are for obnoxious douchebags.

[@brianshaggy]

Captain Shark you know there's no scientific studies to back up your claim, loud pipes save lives

[@brianshaggy]

JulmustKebab but you can hear us when we're around you, it should be loud enough to were i let you know I'm next to you but not too loud to wake a whole neighborhood up

[@frictionr6389]

I love watching these videos than doing the opposite to my build

[@vitezslavrozum]

Well, loudness is desirable, beck fire is desirable, if you taking off your muffler you might end up removing catalytic converter, if I’m not wrong Jdm classsics do not change the fuel injecting because of those o2 sensors and My European classic does not have those sensors anyway… so I think it is all good.

[@vteckicksin4576]

*HONDA guys Triggered*

[@AnotherYoubue]

I didn’t it, just truth most wannabe Honda guys dont know jack

[@witherspoon1995]

That's no hornets nest, that's V-TEC

[@Patrick94GSR]

My Integra still has the original 24 year old muffler still fully intact.

[@liambryant5150]

I like how he makes tuning your engine sound more complicated than it is

[@davidridley571]

But to normies tuning is basically black magic😂

[@Jessehermansonphotography]

Real tuning is.

[@senorbonbon]

@@davidridley571 noob question, So tuning is the move then changing the exhaust

[@ArcYT]

@@davidridley571 yes

[@shaneomac5074]

Tuning is incredibly complicated, that’s why a lot of professional tuners specialize in one type of car because it’s so complicated, it’s not like adjusting an old carburetor

[@macwiller2105]

The OEM muffler on my Ram was HUGE and restrictive, I took it off and put a Flowmaster 10 on, what a difference in sound.. my truck sounds like a truck now

[@trickmiller8169]

I bought a car with no muffler. The guy lowered the car and something ripped it off while he was driving. It had a resonator on it and that was it. I installed a whole exhaust system and it made it louder.

[@slammedek9458]

Basically dont even put a sticker on your car because he'll have a reason why 😂

[@OverlandOne]

Stickers on your car, especially the ones like STP, can mess with your computer and throw off the air/fuel ratio giving you even worse performance than you had before putting that sticker on. Also, stickers are illegal in some states and your car will fail inspection. The engineers that designed your car did not design it to run correctly with stickers.

[@pxndxlunx5821]

@@OverlandOne and that's getting scott free, if you have bad luck, those stickers will decrease your hp and even kill the engine. They wear out the valves and the pistons real fast.

[@biguwus9773]

@@pxndxlunx5821 Scott Free

[@jordansheppard6643]

it can mess with ur paint

[@Imakebootysclap]

I got floor mats for my 2016 forte5, Scotty was not pleased, came up with a reason why that would fry my piston rings at 80k miles and void my warranty :P

[@666madmal]

Changed mufflers changed air filter Re jet carb Runs smoothly no detonation Perfect!!👍👍👍

[@mikeyinid]

How does this guy have 6mil subs. The world is a crazy place, KZbin is even crazier.

[@just.jack1011]

Moral of the story get a follow up tune whenever installing different exhaust pipes if it isn’t running right

[@JLin576]

Just say NO to FART CANS!

[@jimallen1485]

Here in Panama, we call them Fart Boxes... But I agree with 100%

[@hanzgerberpresents]

Scott Kilmer is my long lost father. Love you dad. Please send money.

[@Javier20104]

LMAO

[@GreatScottByJoe]

loool

[@MetalRocker94]

I've modified the exhaust on every car I've owned. It doesn't need a tune or any computer work unless you install a high flow cat or headers. Anything cat-back is fine to just install with no problems.

[@rockhunter8483]

Thank you Scotty, now I understand what happened with my car. They put the loud muffler on and it hasn't run smoothly ever since!

[@pctshooter]

I had a 1982 Mercury Lynx that had a huge muffler and a tiny tailpipe that would top out at 89 MPH. I had the muffler taken off and replaced with an ANZA angle cut resonator tip. The sound was great. I put one of those TURBO stick on placards on the hatch lid. Everybody swore it had a turbo with it backfiring and flaming. It would then do 125 MPH with no further mods. I loved that car to death!

[@0669249]

Scotty, you're too old for this. Take a breath while you realise modern ECU's are perfectly able to re-tune themself to new AFR after MINOR mods like catbacks and intakes

[@pauldaniel6208]

Well said. Scotty's ignorance on this topic is obvious, as many modern cars show a decent increase in power with just and intake and exhaust, without an ecu tune. When one actually tunes properly, the gain can be substantial. There is an entire industry based on doing this and have dyno numbers to prove it, not just the rantings of an old man 😉

[@TeeroyHammermill]

>Korben Dallas: You do realize that ECU's are programmed to be in compliance with EPA guidelines don't you? It'll retune to stay in compliance, usually resulting in a leaner running engine.

[@0669249]

@@TeeroyHammermill yes I know, hence why I said MINOR mods. Some ECU got more latitude than others and I think it's simplistic to say that every mods will harm every car lol.

[@zacharyriley4122]

Korben Dallas can you tell me where scotty said “every mod will harm every car” or any equivalent statement? i heard him say that these mods were bad to do if done improperly and without tuning, but i missed the blanket statements...

[@jeremiahginter1892]

Paul Daniel m

[@nandorodas8215]

I actually just install a flowmaster super 10 on my f150 and it seems to be running better in my opinion with no tune yet

[@Gojira_Wins]

Funny enough, I bought a 2002 Mitsubishi Lancer from a woman who said it didn't have a catalytic converter. Turned out it had an $900 Magnaflow high flow cat and muffler. Needless to say, it made it sound like a Nascar. Now? I just bought a 94 4Runner off Craigslist. Turns out. Someone decided to straight pipe it so it doesn't have a muffler. Still has a cat though, just no muffler.

[@DreamHachi]

My 67 Chevy had a flow master on it but, it fell off somewhere. Hello straight pipes

[@frankjdm4636]

Lol

[@stevebbkny2394]

Best comment yet

[@cdshawn]

Cracked Egg .....I hear you, Player!!

[@justinl9677]

I hate it when my mufflers "fall off"! It seemed to happen to every truck I ever owned from age 16 until my late 20's. It always happened about the same time too, right after I got it...weirdest thing Ive ever seen! ;)

[@anthonyrodriguez1953]

Hello flow masters muffler

[@billthompson5644]

I love that little no farting symbol, that was kind of funny.

[@AyeSupQT]

Got a laugh out of that too, Scotty's the man

[@squidwardshouse67]

Kind of? That was hilarious 😂

[@ChristyOFaghan]

i liked the one of a crying kid that appeared when he talked about the fuel ratio sensors being 'very sensitive'

[@BigBarnV1]

I liked that one and the girl crying

[@wowomg1980]

lol Indeed

[@TheSupart91]

Ever since scotty has been adding memes .....been having me rolling🤣😂

[@sandywoolf2883]

The video is great. It is very good to install the exhaust muffler on the car. I bought a pair of this renhotec brand muffler not long ago. After installing it for a while, it is still very good. It is recommended that if you are interested, you can install the muffler.

[@Jac735]

Older cars I would definitely do this newer cars its best to leave alone unless you do minor things here and there for daily driving I recently got a vibrant street power muffler and just have the axleback pipe didn't mess with my cat or nothing still sounds good I learned my lesson on my wannabee build up car when first getting into the scene 😆 🤣 😂

[@benson2873]

0:41 what’s he lookin at?

[@bluedinero3055]

Teleprompter

[@goosebee]

Yo benson, how's modacai and Rigby? Still bothering ya?

[@brisonculpepper8079]

Goose Bee dude😂

[@Philip-kc2et]

Oh boy, is he blind?

[@JorgeEspinoza-ov7nj]

Coming soon why not to drive your car

[@jeandufresne9225]

If I wanted a quiet car. I would have got a prius. I do it cause I want my car to play the song of it's people.

[@gooz0mbie]

jean dufresne if you have a Honda I swear...

[@jeandufresne9225]

I don't. lol But I wish I did because they are cheap and easy to modify. If you ever have spare time, check out boostedboiz channel on KZbin.

[@gooz0mbie]

jean dufresne they are garbage cars. I’ve seen that channel

[@jeandufresne9225]

gooz0mbie Why do you think they are garbage?

[@Zordy21]

I may not be a fan of Honda's but they are far from junk. IMO Honda's are better than Toyota because they last forever but they aren't insanely expensive to repair

[@JakeBryanWolf]

Scotty openning statement: "History lesson..." Me: He we go again. Old minds in the age of adaptive, self learning technology.

[@neauxmad1048]

Love how he talked about tunes but still said don't do it. Love this man 😂.

[@MICKEY4356]

Nothing like a pair of Cherry Bomb mufflers on a V8 engine.

[@piratepete-thetruthisforevery1]

Yup, I had that set up plus headers on my 340 Duster... Thumbs up!👍🏼

[@docholiday9786]

I just added a cherry bomb on my 2014 Silverado and now I'm getting a slight rough idle

[@y.bowcat7782]

this is the most boomer comment I've ever seen

[@gmax341]

I want to either straight pipe or cherry bomb the muffler area but after a call to a shop I had work done at years ago, sadly I was advised against it. He claimed that I would lose performance especially during towing situations. Now I'm frustrated...

[@tomsteere8904]

I had a 1979 monte carlo with a built 350 and put some old school glass packs from the 70's on it. That thing sounded awesome. One of the best sounding cars I've owned.

[@never0ps937]

" people talk loud when they want to sound smart right" - Squidward

[@julianbennett4088]

neVer0ps “CORRECT” -Sheldon J Plankton

[@TheHuskyK9]

Except he knows what he's talking about. He just doesn't recommend it

[@goosebee]

Ahahahaaaa 😂😂😭😂💛

[@JosiahAndrewNavarro]

Imagine being a Nissan lover! Lol

[@swere1240]

if you put a turbo on your car and have a tuning software then its neccesary to have a aftermarket exsaust otherwise its pointless with minimal hp gains and more speeding tickets

[@montakims]

Thank you Scotty, changed my mind about switching my exhaust as I don't know too much about tuning and adjusting fuel-air mixture ratios or anything.

[@Cliffjumper]

"Modern cars are very sensitive" Shows girl crying🤣🤣🤣 I love your humor Scotty🍻

[@bearing_aficionado]

Cliffjumper that was savage on his part. Too bad he didn't show a crying ass liberal dude with pink hair and wearing a dress.

[@earlibee]

"Polution" someone farting lol

[@alainaguilar9938]

Ryan Bond don't you mean most conservatives?

[@bearing_aficionado]

Alain aguilar, um no. Since when do you see conservative guys with pink hair and wearing a dresses now do you?

[@Kodiak97x]

Invalid, my 5 cylinder needs to sound like a rally car

[@geckog35]

SGKatrox lol Audi Quattro sounds

[@bmoore7402]

Hypesoul so what your saying is you want a camaro that doesnt blow head gaskets?

[@zebrahead32199]

indeed

[@audreyhelha7419]

Am ordering a a DC Sports muffler right now as am watching Scotty

[@Cerebro960]

Hello Friend how are you? Everything you said is true because once you take things away from the exhaust system the car is much slower, feels heavier and consumes much more gas. I know from experience. Thanks for your good advice.

[@glennjunipermarshall531]

I'm fine with changing the exhaust but make sure that it's not a fartcan.

[@racers115]

When you said you went to the Indy racing and was partially deaf for a days after I know what you mean. That's what it's like when I watch/listen to one of your videos.

[@andrelucas6134]

Scotty's definitely right in this one I installed Borla Attacks Mufflers on my 2014 Mustang V6 and it definitely feels slower, feels like Honda Civic 4 cylinder during acceleration it's embarrassing 😅 also car feel like not shifting right, but it is loud as hell. Gonna weld my Stock Mufflers back on. That was $980 down the drain. Little advice if you want your vehicle performance very nicely keep your vehicle Stock, unless you were adding turbo or super charger on it then you can mess with Exhaust, Tune and all that, otherwise it's not worth it,

[@kevinkelly4436]

The exhaust system I put on my car back fires after I put my foot down on the gas pedal. So Scotty is speaking the truth.

[@jesusislord4060]

Did you have the car tuned after installing the new system?

[@JackSadler]

this video should be shown in schools across the world.. :P

[@nsx1075]

Jack Sadler couldn't agree more

[@jimmysapien9961]

Hell yea why no

[@majidaskari8306]

here you can see an example of someone who removed the muffler and disliked the video.

[@Kodiak97x]

Next video: “Why cars shouldn’t be fun”

[@Lrules364]

SGKatrox "why modern cars aren't as fun as 90s cars"

[@kerwinwade1884]

Lol

[@jessewestover6652]

"Why the only car you should own is a bone stock mid 90s Toyota Celica"

[@losdayz2894]

Jesse Westover lmao

[@NumbaOne]

you have to tune your exhaust then it would be fine to change it but if you dont tune it it will be just like he said in the video

[@georgemuroki6988]

How about the exhaust pipe near manifold?

[@mariot.5178]

If you change only the mufler you don't need a tune. But if you change the hole exhaust system get a tune + intake I recommend.

[@billalmabuza8835]

Watch this video. I removed the Muffler anyway.

[@tiktoktiktoktiktok6065]

Billal mabuza well??? Did the performance of the car change like Scotty says?

[@romo134134]

@@tiktoktiktoktiktok6065 I changed the muffler on my '06 Tacoma and haven't had any noticable power changes or even a check engine light. Just a nicer sounding truck, which is what I wanted.

[@ICEY02]

Imma about to do it tomorrow haha

[@russianchopstick7938]

@@ICEY02 lol doing mine monday

[@zyonrichmond6945]

Me to