How can a 4 cylinder sound this good? Lets see how they did it.

[@MikeShelby67]

Wow the new system sounds great! You wouldn't expect a 4 cylinder to sound like that.

[@RacerX9]

I agree Mike.. it really surprised me

[@DennnnnnnY]

Srt4.. lol

[@timm.6391]

It's due to the unequal length header... get an equal length and it loses that rumble

[@Skullman7487]

@@DennnnnnnY my srt 4 has borla and its gotten louder over 2 years. I may be making a borla atak axle back exhaust

[@lukengeenock2284]

@@DennnnnnnY sti you mean

[@hardkrow]

Best work I’ve ever seen by a “muffler” shop ... A+

[@RacerX9]

Agreed.. these guys are solid

[@Rocklyn1]

Great work.....I had some old timer do my mid delete on my cat.....he was amazing too....best part was when his friend, a guy with a walker, who looked to be 90.....pulled up in a highlighter colored ZL1....😃

[@johnrambo9771]

Totally agree.

[@evilf23]

Same problem I'm having with local exhaust shops is they use the cheaper bending machine that shrinks down at the bends. Put a caliper on a 90 degree section and it's about .25" smaller outer diameter than the straight section, killing flow so you end up with a bunch of noise for little to no power. Mandrel or piecut is the only way to go for performance.

[@caboose22320]

10:54 finally starts the car

[@LMCWUE]

Genuinely one of the best sounding exhausts i've ever heard!

[@wolfman0013]

I got the Street Demon installed on my Challenger the beginning of last year from Kenny's, and it still sounds great! Kirk is awesome at what he does for custom installations. Highly recommended.

[@RacerX9]

Phillip Wolf .. agreed my friend! Excellent shop

[@wilschnella1202]

Surprisingly it does sound really, really good. You wouldn't think that was the sound of a 4 banger.

[@scatpack5076]

A friend bought a 70 Road Runner 440 six pack off the show room floor. That car hooked me on Mopars. No cats till 1975. Exhaust looks so much better! For a 4 cyl it sounds really good. Better than I thought it would. Now you can zip around with pride.

[@RacerX9]

Absolutely.. love the look and sound of the old Mopars. I am really happy with my little pocket rocket.. sounds mean for a 4 cylinder for sure

[@dirtyfax]

I know this is an old video, but it's new to me. That's the best sounding 4 cylinder I've ever heard.

[@ninetenscoffee5780]

with a sound like that, I would start my car everyday for no reason

[@JesseLuera-l2k]

I have a 2014 cruze lt would be nice to sound like that Subaru

[@skycoh3581]

Woo! That boxer rumble! I have the WRX with equal length headers and a full MAPerformance turboback exhaust...and I love the way it sounds. Subaru's boxer has a nice, beefy 4-cylinder sound for sure!

[@RacerX9]

Yes agreed.. something about that header design gives it a really unique sound. Very happy with the result

[@APinTheAK]

Unequal length header is what causes that unique sounding “boxer rumble”. Equal length sound wise just doesn’t compare ☹️

[@cynoshifter]

Same color as my WRX, love it. I did the exhaust on mine myself. I have the FA20 so it has equal length headers so no burble but it is loud! I did the grimmspeed turbo back with nameless muffler deletes. When I dropped it down and did a cold start I thought what have I done! A few years later I still love the sound, kinda sounds exotic.

[@dougedoug2105]

Took delivery of my Brand New Ram 1500 today at AutoNation CDJR in Fort Worth and drove it straight to Kinney’s for the muffler delete. Great customer service, In & Out in 30 minutes, and now my shit sounds like a proper truck. Couldn’t be happier; Definitely would recommend them for all your exhaust needs. 👍🏽 Thanks Racer X

[@SovereignKnight74]

Great review! Love that red Challenger! That Roadrunner is sweet! Love the enthusiasm in all of your reviews! I agree that the WRX pulls off an amazing sound that I've not heard on other 4 cylinders! I will give it a pass in my book! Love the new pipes! Have a great weekend bud!

[@RacerX9]

For sure my friend.. much appreciated. Have a great weekend

[@fullofpeace3486]

Is this type of (aggressive) sound not be able to be made on other 4 cylinders like the Toyota Camry XSE?

[@Avetho]

@@fullofpeace3486 Mechanically, it cannot without special exhaust headers. The WRX is a boxer engine, while the Camry is an inline engine, and given the engine bay size on a Camry there might not be enough room to fit unequal length headers that join cylinder pairs 1/3 and 2/4 to get the Subaru rumble/burble sound, and that requires some artistry to join cylinders that are not adjacent to each other. It also depends on if the XSE comes with a turbocharger considering its a sport model, though from what I can tell the 2.5L VVT-i engine is naturally aspirated given its 200 someodd horsepower. The EJ205 firing order is 1324 which basically means left, left, right, right, so there are two pulses on one header length and then two on another header length. The unequal lengths join the pulses into a larger one at near idle speeds giving the "Subie Rumble" that we all love, so its just a matter of matching the pulses and header length ratios from the EJ205 onto the Camry's A25A-FKS, or the 2AR-FE if its not the 2017+ models. TL;DR, special headers if they can fit on non-turbo engine, unequal length runners join cylinder pairs 1/3 and 2/4, one pair needs to loop around before joining at the collector to give the pulses the right delay for the Subaru rumble.

[@dragvan1937]

I don't think the roadrunner had cats. Lol. I like the looks of the exhaust on it. I think it is something I'm looking at doing for the Drag Van.

[@RacerX9]

I don't know if the original road runner had cats or not. The exhaust was done at the shop so it sounded nice. Perhaps the drag van needs an upgrade lol... good stuff

[@sengsythao1896]

Sounds very nice! I like my exhaust to also have the low growl exhaust noises as well and a custom shop where I live does a fantastic job on my vehicles. So much rather perfer a nice tone with slight performance than a full blown straight through with more performance but is obnoxiously loud. Good review! 😎👍

[@RacerX9]

Thank you my friend... I thing the tone on this one came out just right

[@DemonHunter022]

Sounds awesome! I’d love to have something like that on my focus for increased HP and better gas mileage!

[@hanshoogendyk2203]

Did my apprenticeship on vw's then owned a 1972 Subaru gsr coupe the sound is much the same both being 4 cylinder opposed normally referred to as dac days, recently owned a 6cyl. 3.6 liberty wagon with manual trans build a set of headers and full 3" system dual mufflers make a sound like full on porshe , sold the car based on the exhaust sound,

[@Scandinavian_Pride]

Hard to answer question - Your exhaust looked a lot like the way mine looks (2000 Honda Accord v6). I replaced the 2 stock mufflers with flow masters. I was hoping that it wouldn't have a real heavy "raspy, crackling" sound and it doesn't.... It really surprised me because it has zero raspy noise. But.... It has that nice rumble sound only for a few seconds, then you can barely hear it.... Now I do have the automatic trans but still haha.... Question - or opinion - should I go with the setup like you have (single muffler) and delete the 2 mufflers next the tailpipes?

[@qfficial7141]

Oh man, they do amazing work, and that sounds very good. Wish I could find an ACTUAL custom exhaust shop here in GA

[@pinche300]

I'm glad I came across your video. I skipped mostly through it to listen to the exhaust sound, but then watched the part of you talking to the owner. And to my surprise the shop is here in the DFW area! I will need to go check it out soon.

[@theRealLJYoung]

Looks and sounds great. You should have had them install mandrel bends in the midpipe @8:45. I hate seeing a "performance" exhaust get clogged up.

[@kirkrob0412]

We offer mandrel as well.

[@RacerX9]

It certainly wont hurt the performance on this particular car since we went larger anyway.. It's getting significantly more flow now which seems to have provided some additional performance

[@kirkrob0412]

RacerX That’s what we want! Thanks for choosing Kinney’s to make it something better!

[@waydigga1982]

Those tips look sick on the STI and the whole system sounds fantastic!

[@RacerX9]

wayde philpot .. I agree Wayde.. I think it came out great

[@dank-dave]

I miss Fort Worth. Born and raised there until I graduated high school and moved to Illinois and it’s a lot more chill here and I feel like more open country roads to race on but idk it might just be me

[@gt0713]

I like it. Just bought me a 2025 Changan Uni-T which is a 1.5l 4cyl turbo and would love if it sounded like this. Not ricey at all 👌🏻 so tough finding an exhaust for this car

[@jensapensa]

kinney seems so enthusiastic and good at what he does. wish I could get my car to the us and get it done by him=)

[@ReidHenderson]

I love when an exhaust guy is able to put some tips on properly. I've seen some custom systems before that were pretty dinky looking from having one tip straight and the other one be all kinds of lop sided.

[@garfylunds7301]

Kinney's does all my work. They rock. The best quality workmanship and they will work with you to get the exhaust tuned exactly the way you want it. BTW ... That thing sounds great!!!!!!

[@mikepoint4983]

What a great inside look of a muffler shop and talk about having a great selection of parts to choose from , your car sounds great Racer X and can’t wait for more videos on the Subaru . Cheers

[@RacerX9]

Much appreciated Mike.. yes it’s a first rate shop for sure. More to come

[@C-Mah]

I know prices change but about how much would this cost if I had the same car?

[@benjaminmurphy6933]

I haven’t even finished the video, but just seeing the Plymouth exhaust I knew they were a great shop and put quality at top!.!.! Any one notice 👀 they actually painted the welds black where they were welded- not only that they taped around the piping to have a clean crisp black line to look flawless. Cuz I believe that to be a flow master- and most come black- and once welded the welds are raw looking and usually rust after just a little while. These guys went the extra mile to not only paint the welds black to resist rust- but actually taped them before painting to have a clean line rather than random over spray. 🤷🏻‍♂️ I tend to notice the details

[@timm.6391]

Haha, I just bought land in Weatherford.... just got the vf39, stock TMIC and some other goodies from a buddy who upgraded his STI... I'll be putting all this stuff on my WRX [both our cars are 2005] I have the cobb access port and software and was street tuning the car before timing jumped tooth. So all the goods going on it soon and I be starting the tune over using e85 this time. And of course, new timing set.

[@steppydaddy972]

Does Kenny's ship their custom parts Racer X?

[@thehonestman26]

Why do I get the feeling that most the time I watch videos like these, the employees can't wait for these KZbinrs to get the hell out of their shop?

[@RacerX9]

That was not the case.. they were glad I was there

[@thehonestman26]

@@RacerX9 Good. I'm glad. The car does sound good.

[@MufflerMoneyTX]

That “street demon” is just a bullet that we get from our supplier i own a muffler shop here in Fort Worth they just add a metal plate and weld it and say they make it but other shops offer them also the “tunnel ram” same thing

[@nicholasdonin1465]

They do beautiful work. The wrx still sounds like a wrx

[@theroyalcrownedtiger2946]

The custom exhaust looks and sounds great, but have noticed that the exhaust pipes are not mandrel bends, it seems to have the crush bends to it, but still nice work, well done.

[@edluv100]

It was good of you to showed the Subaru some love. Btw ... that’s a nice sounding four cylinder

[@RacerX9]

For sure.. much appreciated

[@Alteris85]

Mo Powa baby that sounds really good. I'm pretty sure that was some weight reduction too. They did a great job with the exhaust work. If I wasn't building my own I'd bring my Nissan there.

[@RacerX9]

Agreed.. those stock mufflers were unnecessarily huge for some reason lol

[@Alteris85]

Yeah they were the size of trash cans 😂🤣😂. I knew eventually you was gonna start messing with the Subaru since there's a good following with them and plus it brings in more of us Import guys to your channel.

[@303Estates]

wow!!!! great sound from a 4 cylinder!!!!! where can I buy that for my Audi A-6 4 cylinder?? thanks!!!

[@cloudchaser3428]

"No wasting time getting it up" lmao I'm dying lol.

[@MaxDad7]

That's insane! It sounds like my Ford Explorer I had back in high school, which had a 4.0L V6 in it. Very deep, throaty sound.

[@djmjr77]

Exactly the vid i wanted to see.. these cars sound great, low rumble for a 4cyl.. want to figure this out for my 4cyl

[@WORTHLESS.DC4]

Damn I gotta go to Kenny’s idc how far I need that precision work 💯🙏🏽

[@koolbass511]

OMG! this sounds so freaking GOOD!

[@nahvideos857]

That 1970 RoadRunner is one of my favorite Muscle cars!! My dad and I are restoring a 1968 right now, he is going to drive it to his 40th high school reunion

[@alexbrowning7485]

Wow that boxer engine burble sounds epic. Love your Scooby! Another great vid.

[@RacerX9]

Much appreciated Alex

[@lemaa4820]

Wow the sound is incredible! I want to get my Kia to sound like this. How much would something like this cost?

[@eptxm5664]

Great video. Sounds nice and deep. Unique boxer sound. Hard to find a muffler shop that does good work. Got my quad tips installed and they were all crooked and after they tried many times they still couldn’t get them right. I gotta find another place to get them redone. This shop is recommended by many in the car scene too. Nice roadrunner. Beep Beep! My dream car would be a 69 charger

[@RacerX9]

Absolutely my friend.. these guys do great work 👍

[@jakegackle7398]

Sounds good, but quiet. They'll always be a bit quiet, a turbo is a muffler after all. However, a high flow cat would do wonders and really let you hear that flat four. I prefer the older style uneven headers, personally, but that system is really professional and has potential.

[@jackasmaryan1776]

Please tell me this didn't come outa Mrs. X'S tune budget 🤣🤣🤣 sounds great buddy Congrats

[@lesterpenner8786]

Thats a nice exhaust upgrade. Sounds awesome. Always loved that distinct Subaru exhaust sound. 👍

[@DadsGarageDIY]

Kirk is a great guy. I had my mid delete on the Scat done there. They do amazing work.

[@RacerX9]

Agreed.. it’s a great shop

[@kirkrob0412]

Thanks for letting us take care of you!

[@Scandinavian_Pride]

That Roadrunner has a nice price tag! You just don't find @ll matching #'s on this car! What a gem!

[@gamertag0o0o17]

14:41 looked like the guy behind you wasn't gonna stop 🤣

[@Hal9k42]

Sounds and looks great. After I saw this I knew this was the direction I wanted to go. Since I am local I called and the guy over the phone (aside from sounding put out he had to answer questions like "When can I schedule?" and "How much?") gave me a quote for a similar setup just 3" from DP to Y and it was double the cost of a name brand system for my car. I try to support local businesses that do quality work like this place but after the attitude and price had to look at other options. Hopefully, others have had a better experience.

[@erictaylor1320]

That is a great looking and sounding exhaust. I’m in western KY wish I was closer. I would definitely give this shop my business.

[@RacerX9]

I wish they had more locations 👍

[@rnicarh2o]

Sounds very legit and authentic.

[@RacerX9]

Thanks Ricky 👍

[@kennethharrison1233]

I’m going to bring my camaro to them whenever I put it back together

[@RacerX9]

Nice

[@roadking01234]

Awesome presentation and exhaust setup.....Sounds tremendous for a 4 banger......Success with the Kinney's Muffler Shop.....very clean and professional set up...Cheers...

[@D1vid3By0]

There's a genny over there too! I've got a 3.8 gen coupe thinking about getting a custom system done but I don't want mine sounding like everyone else. Looking into ordering a couple of those street demon mufflers!

[@lostsoul7773]

Old video, I know. But I just got a 2024 WRX. I want it to sound just like this. Is there any drone?

[@Tight--LiNeZ]

That's cos it's a boxer. It's inline 4 pots that sound mud (if not cross-plane crank).

[@cecilianormand1825]

Finally, a video on the Subaru

[@anthonye.2553]

Damn that sounds effin awesome! I love the low rumble versus the loud ones. Wonder how I can make my V6 Camaro RS sound like that?

[@abishek4300]

Get a custom X-Pipe

[@ericfernandez3815]

So glad I watched this to the end. I wouldn’t have known Kinneys is near me. North FW here.

[@mrwashur1991]

Subarus just sound so good. I’m a truck guy and the Subaru rumble is one of the best sounds a 4 banger can make. It’s also the most distinguishable sounds for a vehicle. I like it better than a lot of trucks out there haha. All the other 4 bangers sound so terrible that I cringe when I hear any other 4 cylinder. God damn fart cans!

[@juanv5892]

Makes me want an sti for a daily.... 💪🏽👍 sounds great. Deep and mellow. Stays away from “fart buckets”

[@RacerX9]

Juan V ..lol agreed! No fart cans on my car 👍

[@brandonburchell8]

Sounds and looks good. Only thing is, I noticed they did not do mandrel pipe bends. All your car needs now are headers and catless DP

[@RacerX9]

Agreed.. but the pipe was already larger so it certainly didn't hurt it at all .. more to come on the STI..

[@kirkrob0412]

We offer mandrel bends at additional cost when desired.

[@VencedorGamer]

My heart sank, when they turned over that Plymouth Roadie. 😍

[@Rj-xp6ff]

Mandrel bending is a must for performance!

[@ShredRMK824]

Is that Kinneys muffler a glass pack? The STi Sounds great.

[@mopar4life458]

Sounds good reall love the 70 roadrunner only one year car then changed body style love the Subaru

[@RacerX9]

I agree with you buddy..

[@kdgg005]

Nice system, great quality, but the bends aren't mandrel bends. The pipe diameter is smaller on the bends. Other than that, sounds good.

[@ragerow]

Wow, sounds good! Wondering how this would sound on the 4th gen Tacoma (2.4 - 4 Cylinder turbo)... Not a lot of options and I am looking for the deeper throaty sound... not the pissed off hornet most 4 cylinder mufflers usually create!

[@craighudson5191]

That Road Runner was sweet and your daily sounded good to.

[@RacerX9]

Craig Hudson .. absolutely love that old Mopar 👍

[@RenegadeRebel83]

Quick question not trying to sound like a critique, truly honest question on the Roadrunner. Where was the flex pipe that is supposed to be on the exhaust for the twisting and stuff that goes on with the exhaust system? I didn't see one just asking

[@DeeJTillDeath]

To get this exact same build from the vid, about how much would that cost?

[@alexanderhamilton7673]

Racer x is the street demon a straight thru muffler like magnaflow? You did not turn the muffler around to see inside it.

[@RacerX9]

It’s not perfectly straight through.. I actually did not turn it on purpose because the owner asked me not to.. they have a very specialized design 👍

[@northtexasmayhem7893]

Would love to photograph 1 of your cars. I have a 1965 Volvo 4 cylinder & looking to get a new muffler & really dig the sound of that street demon

[@vinceandal7161]

Broo it sounds so good i want mine sound like that😭

[@scorpioslab]

Equal length header Into one expansion tube 18 inches dropped to an all 2.5 inch all the way back to a resonated tip. Always sounds best. No catalytic converter, or a very high Flow catalytic converter.

[@ax-50]

0:44 "honey, I think the guy in front of us were filming" Btw, I loved that sound!

[@southsidesantino1981]

Did you remove resonator? Love the sound. Im looking for a throaty exhaust for my 2.4l Hyundai sonata 2013. Any drone in that system? What was price on something like that? Thanks

[@Luminous.Dynamics]

It looks like the aftermarket muffler replaced the stock resonator. I would say you could get a very similar sound if you put in some unequal length headers on your car and an aggressive straight through Muffler such as a Carven R muffler where the resonator is.

[@Nikkosan327]

Damn, we missed you yesterday. Got a scat pack widebody Charger about a month ago. Was going to head up to Kinney's to get those mids removed but the day ran away with me. Another time, then!

[@RacerX9]

No worries.. get something scheduled with Kirk.. they will get you taken care of

[@greganderson1989]

1970 road runner. My dream car.

[@JiltedValkyrie]

Making me wanna drive all the way from California just for this. I wonder what they could make my 4-banger Camry sound like.

[@PhillipArmstrongJr]

Not a chance. It’s the opposed 4 cyl that helps it with the sound. 11:10

[@scorpioslab]

What is the exhaust doing under the frame every car I've ever did exhaust work on it goes above the rear frame crossmember

[@glockbiggy]

Do I have to bring my own pipes to the shop for them to install when I want a Muffler/resonator delete?

[@nasfordf150]

Thanks for the recommendation, currently here getting it installed in my 21 WRX!

[@Dnasty1]

Wow it sounds deep and not like a bumble bee. How?

[@natthaphonnoble2407]

Actually would have been nice to hear how the stock system sounded like for a better comparison.

[@anthonymroz8832]

What was the cost and the name of the muffler You used. Ready to do mine Thanks Sounds nice..

[@James-xo4uv]

Those factory mufflers are HUGE ,znd must be heavy too

[@joseaguirre2082]

All Subaru WRX sound good with with an exhaust system. Boxer motors do sound great

[@RacerX9]

Yes it wakes up the sound quite a bit.. not sure why they used massive mufflers with the such a small Y pipe.. seemed a bit odd

[@alejandrocabrerajunior2859]

Very nice sound. I wonder if it will sound the same on my explorer 2.0liter

[@joelgarcia6163]

amazing muffler store nice job berry clean its hard to find a please like that in NY or NJ

[@DrewShiiesty]

I have a 2009 Audi A4 2.0t b8 how would I make it sound badass it’s a 4 cylinder too

[@MWR-lg9qp]

Love the sound. Great job.