7 Things Your NEXT Exhaust NEEDS- and 7 things to avoid!

[@andywiththen]

Can't wait for all the experts to come out from the woodwork who "know better" Good job FMU very informative.

[@dcgeeked8917]

it's not that deep

[@mishaisspeed]

​It really isnt, you are right ​@@dcgeeked8917

[@colorado.e9x]

I would love to see a before/after compilation of your megaphones

[@mishaisspeed]

They won't ever do this because it doesn't make a noticeable change

[@davepetrakos1192]

I just saw a video this past week with dyno results. He also mentioned how it is a struggle to find the best location for them to not only fit underneath car, but to actually improve engine performance. Note: I hope I'm not confusing 2 different videos in regards to the dyno results.

[@crystalzues4712]

Would love to see your guys take on one of the popular 4 cylinders such as B series. Very keen to see how your design ethic would change how they sound.

[@trentdavis9809]

Very curious

[@Pocketbassist]

Yup! Facts

[@tayvonrose2528]

THISSSSSSS

[@street_bull03]

I’m going to make one to their specs for my fa20

[@thebigone6298]

There is no way that will happen.

[@PROTO_JK]

Great content. OJ the way you speak clearly, calmly, and confidently, you’re a natural for this platform. We are all lucky to have you and your knowledgeable team.

[@FluidMotorUnion]

Thank you so much 🤗

[@carguy7627]

OJ, no exhaust sounds in the exhaust video? Come on man, give us the eargasms we all need!

[@Thats_X_]

I watched the whole video thinking we was going to get a exhaust sound clip like at end like the Mercedes v12 video 🤦🏾‍♂️

[@RobinI92]

Come on he wants us to understand what is said so he cant distract us with so wonderfull sounds!

[@Simple_Jack82]

Preach!

[@-ev1l562]

First time seeing this chanel. Definitely earned a sub! I love how clear and concise your points are, no beating around the bush, no pulling punches. KZbin is in sore lack of this quality of content.

[@FluidMotorUnion]

Awesome, thank you and welcome!

[@darrylcavanaugh9465]

39K subscribers? REALLY!?!?! Tell all of your gear head friends to checkout this channel. Ojay is a badass. I wish I had a shop like this near me.

[@dorigecko]

Jacked Ned Flanders knows what is up. Love it

[@WiseGuyzGarage]

OJ, you really knocked this one out of the park. Straight to the point, easy to understand, and gave very valuable insight into how the exhaust system should be crafted.

[@jjstolethefish]

I'd trust anything this man says idc who you are or what expert knowledge you have OJ is right period

[@altoticket]

Such a classy video, informative and straight to the point, almost a “Exhaust 101” masterclass. Great stuff

[@gerardburick1797]

I like this. An idea followed with detailed information to show why the idea works.

[@invo5]

Would love to see you talk about: 1. Four cylinder exhaust optimization (NA and turbo) 2. Ovalized exhaust tubing for low cars (yea or nay)

[@dannoyes4493]

Biggest frustration? Trying to get long tube headers & exhaust for a naturally aspirated, high revving, VG30DE in a Nissan 300ZX (Z32). Well done.

[@BringBackButtons]

I picked up an n55 m235i and the previous owner put a v**f race exhaust on with a dinan performance midpipe. The system is lightweight and functional, but i knew that it wasn't meant for me long term and have actively begun searching on how or what I am going to fix/revise this. The tone and drone could have vastly been improved with tuned resonator, taking away that annoyance between 2700 and 3300 rpm. At some point in life, Id love to meet both you and alex from lsc, but more importantly, since im in the midwest as well, sometime have your team guide or build a way better "performance daily driver" exhaust. I love nice exhaust, but theres a difference between purpose volume and just loud and crass. Keep up the good work, hopefully a future client someday.

[@BethanyAuto]

Thanks OJ. I’m teaching myself TIG welding mainly to be able to build some wild custom exhaust systems I have buzzing around in my head. I can’t wait to run some beads on my first stainless system.

[@AZ-hf9ow]

Your exhaust work looks amazing 👌😎

[@yamman93]

You guys really hit a home run with this one. Excellent video filled with information that is presented in such a way that makes it very easy to understand

[@FluidMotorUnion]

Glad you enjoyed it!

[@1FiftyOverland]

I wanna see what magic you can do with a 2.7 or 3.5 ecoboost f150 exhaust.

[@nickom7828]

I was looking for someone, if no one asked then I was going to lol. I'm up in Wisconsin so not far away from them!

[@benganey3924]

Biggest frustration- paying top dollar for Hooker Aero chamber DUAL 3" in 3" out muffler just to find out it necks down to a SINGLE 2" inside😢

[@joslaleb_]

My question has always been where to place the mufflers and megaphones throughout the system. How does the position of these change the tone of the exhaust? Is it better to have megaphones at the beginning of the system, in the middle or at the end? How does the length of the megaphones affect the performance and sound? Is it better to have mufflers at the end of the exhaust system or in the middle? It would be great to know that information with the help of your experience. Great video!

[@FluidMotorUnion]

Megaphones are really trial and error. We have been able to do a lot of that. There are so many combinations depending on the vehicle's set up, your goals, as well as space constraints.

[@Dubst3pT3ch]

What they're trying to say is it's a trade secret, and we will never get a straight answer.

[@MBoda21]

Great video OJ! Fluid MotorUnion exhausts are works of art in my opinion, keep the content coming! Thanks for taking some time to snap a picture with my father!

[@tedjones-ho2zk]

I would like to see a high flowing exhaust that sounds as quiet as stock on a fox body mustnag. My current exhaust that I have use a couple of Dynomax VT mufflers that do a great job in getting rid of drone, and that's with a magnaflow high flow catted system. Is it possible to have a non-catted system, that flows without being much louder than a stock system....

[@7000U9ZHIFT]

Yeahh ,I use hush thrush mufflers on LS3 with 2in longtubes and catless x pipe... sounds great without obnoxious

[@v1-vr-rotatev2-vy_vx31]

Totally agree with vibrant industries resonators They knock out a lot of sound, place them At the rear, Beyond the Magniflow mufflers

[@ryanpooler3962]

Awesome video, OJ! The exhaust topic is a tricky subject, and oftentimes was regarded as sorcery and black magic in realms of old....😂 Your exhaust "code" is very, pardon the pun, sound. [Dad jokes anyone?] There are so many rabbit holes on the subject that you can dive into, and it would be neat if you untangled some of those in future videos. I loved your magephone segment a few weeks ago! I am currently building a radical custom exhaust from alpina type headers back on a BMW e53 X5 I6 (rare manual transmission) with some really cool hat tricks and some modular sections for experimental sound tuning. Rabbit holes. Everywhere. 😂 Love the channel, man!

[@____MC____]

I just finished my first full stainless with the right welding wire and gas this time. Ugly but functional welds. I had to use pie cuts to find different angles in 3 spot. I found myself using tape to hold them in place then peeled some back to tack. I noticed any angle cut pieces elongates the hole size and doesnt match exactly. Had to cut apart one section after it moved an inch off. Found welding my way back was better. Learnd cheap v bands are trash. Learnd v bands warp and need to be filed flatt. Came out okay. Made my own x pipe out of 45° to keep a low angle and didnt over cut the middle to cause a pinch point.

[@HisNameIsTater]

The ugly butfunctiona got me rolling. If they are ugly I doubt they are functional. On a serious note if you are serious about learning to weld look to any technical college close to you most offer classes for hobbyists.

[@____MC____]

@HisNameIsTater ugly meaning not perfect dimes. Not 1st timer low amp globs stuck together on the surface. The inside had a weld line where you can see different metal.

[@MustangGuru]

Corsa extreme double X pipe is in my opinion the best sounding out there, which is what I have on my Roush stage3 supercharged car. And it has no drone at all. On my NA 2019 Mustang (wife’s) has the AWE track edition on it. Drones a little and has a deep tone.

[@FluidMotorUnion]

The customer had that exact system. Didn’t love it so he went searching. Got magnaflow next, hated that. That’s when he got us involved. Feedback from the last three weeks has been- “it’s the only system that’s done exactly what I wanted when I wanted… take when you cruise, LOUD when you get on it, a classy sound… NO drone!” More on that coming up in a few weeks

[@anthonylezada8532]

The Audi 3.0T supercharged engine is known in the Audi community to be difficult to make sound good once you throw test pipes in the mix. I’m curious as to what you’d do to get it to sound awesome not only at WOT but also at low throttle city driving with a full custom setup from the header back. All my 3.0t friends and customers who run test pipes either have something custom to combat the ugly rasp, volume and/or pitch as there really isn’t a system out there on the market people are 100% happy with….

[@See7ayyeesix]

This…

[@Shmallstizzy]

Absolutely love the professional way you presented information! You guys seem like an awesome business and I hope you are extremely successful

[@Jugghead]

Can you do a 4cyl turbo exhaust?

[@brawndothirstmutilator5863]

Why would you think they can't?

[@Mastermindyoung14]

Pipe is pipe my guy

[@Neggs2000]

Where this is most apparent is the VG30DETT Nissan. I love them, but the exhaust note is awful with an H-pipe and way more smooth and exotic with an X-pipe. Awesome video, thanks for sharing your experience. This is for real performance enthusiasts.

[@ricardopontes9373]

Great content man. Discovered the channel a week ago. I live in Europe and in a near future thought of ordering an Exhaust from FMU for my GTI. I understand it's not perfect as would be better to have the car in the shop. Unfortunately I can't. There's a lot of stuff on the market but sounding thin can plus questionable performance when that gets into the dyno.

[@IronLrdVader]

Another great video. I want to add a megaphone to my Camaro, but it’s obviously tricky and there is no way to know if going megaphone will help with higher pitches and lowering rasp. I think the LT1/LT4 engines will always have some kind of rasp due to the engine design, but reducing it while still still having a strong sound is the goal

[@blackfrost273industries4]

Most frustrating things? Trying to configure a cutout pipe system for in the neighborhood and one out of the neighborhood. And probably going to see more info on megaphones, see the german guy on the f1 sound production (because i have a i4 as well as my canadian 4.6 ford). Dont want to spend too much, but want to spend the money right. Etcg1 put a cutout on his car that is remote controlled. And had minimal conplaints. Mainly dampening the rattle that sets on it.

[@daviddup1978]

Wow, now that's knowledge about exhaust building.

[@mariannetremblay6441]

I really like the sound of the new exhaust you guys made ! Very much refined compared to the old one. The welding and to materials wow you guys rocks ! That one system i would put on my E550 coupe. I don't like the brap notes and unclean sound so I kept the original exhaust for now.

[@FluidMotorUnion]

Clean and refined is the goal!

[@samuelho3289]

GT350 sound clip please!!

[@sofiyactually]

Seriously thank you so much! This is the most informative video on exhaust I've ever seen. Wish I could get an exhaust system from you guys but I live all the way out in California. Keep the videos coming!

[@FluidMotorUnion]

Any time!

[@kyleolin3566]

Great video. Tons of relevant information packed into a relatively short video.

[@TheRealCCSmith]

Perfect!!! I have an old 350Z that needs some exhaust help 👍

[@MarcStollmeyer]

So the 1” per 100 hp rule… hp is linear and pipe diameter to cross section is exponential. So even in your example of 700hp with two 3.5” pipes (thats 19.2 square inches, 2.75 per 100) the rules falls apart because if you used one 7” pipe it would be 38.5 square inches (5.5 per 100hp), about half the exhaust velocity. Some examples I’m familiar with: Stock SBC street engine with 300 hp two 2.5” pipes (breaks your rule), thats 3.3 square inches per 100 hp. Racing SBC with 450 hp uses two 3.5” pipes, 4.3 square inches per 100hp. Modern Corvette Z06 with 670hp, two 3” pipes. 2.11 inches per 100 hp (reflects average corvette driver). Based on those I’d say a much better rule of thumb would be 2-3 square inches per 100hp on a street engine. 3-4 square inches on a racing engine. 4-5 square inches on hot race engine. And your other example.. At 2.75 square inches per 100hp an 1800hp engine should have a single 8” pipe or two 5.5” pipes.

[@ketillundsrensen6167]

Previous owner have changed the exhaust and overtighten all U-bolts so the exhaust leaks a bit. Just waiting on my new header so I can put in a anti backflow piece and make the rest of the system silent and non leaking.

[@SystemScandll]

I'd like to see the percentage difference between your multiple H vs X pipe tests. I remember seeing one test on engine masters that didnt show a large difference but would be interested to see more info.

[@-ev1l562]

Im by no means and expert, but id venture a guess that it has a lot to due with the engine it self i.e. the exhaust valve setup, cam selection, CFM rates, and most likely - intake bottlenecks

[@FluidMotorUnion]

We’ve been playing with exhaust development since 2008. A time where we weren’t video’n everything for the tube but lots of content written for our blog you can pour over on our website. This video is about getting the best power AND sound. The h pipe can perform similarly depending on the application but never sound as clean, they develop a blatty rasp from the 90’ degree intersections. Some people like it cause they hear a decent sounding vehicle with an h pipe and they think it’s the h-pipe, not knowing what that that same config would sound like with a proper non-90 x pipe… ON THE SAME EXACT SYSTEM (it would sound cleaner) Because this particular experience has formed our opinion- It doesn’t make more or less power, it sounds worse, so why use it if we feel it’s never better?

[@_droptopis_]

Biggest issue for my setup is the lack of space of the midpipe. I can either get a x pipe in there or a resonator not both. Only way I can fit both if I removed my cats.

[@FluidMotorUnion]

we are almost always working against space constraints

[@superdutymoose]

I wish I had a real exhaust shop around where I live. I would drive there just to get mine rewelded.... The weld on mine suck....

[@johnelopez5482]

Very informative content. Thank you for sharing.

[@LeachimSagrav333]

I'm fixing to do a full stainless exhaust on my gen 1 lightning. Custom stepped headers and a couple of your megaphones. I may end up getting some dr.gas boom tubes?

[@naptamisprime]

I wish I was near you guys I'd definitely bring my slk230 (m113k with manual swap) to you guys when it's ready tp get piping done

[@FangOfTruth]

I have been trying to decide what muffler(s) to use on my car. So I have been researching especially since I am on a tight budget. One thing most people don’t consider is as the exhaust gases travel through the system it cools and shrinks. I used to wonder why the interior volume of the exhaust pipes were smaller after the headers. But came to that conclusion.Thanks for your information. Watched the megaphone video also.

[@FluidMotorUnion]

Thanks for watching!

[@lilholy3279]

Honestly a really great vid! Would like to see a video on inline engines (I3, I4, I5, I6). I think those are the hardest to get sounding really great.

[@FluidMotorUnion]

Great suggestion!

[@Dubst3pT3ch]

What do you mean?! Inline 5 cars always sound amazing.

[@dodgejohnson5819]

I have an 06 charger R/T 5.7 hemi and am running solo performance 3” stainless steel no mufflers no resonators but have J pipes and sounds great

[@jasminemunoz539]

I wanna get this exhaust system been hearing your work 👍 love it

[@jeppakongur]

How to measure Drone and eliminate it 🎉🎉 it is the most common problem in nearly all aftermarket systems.

[@hiddenloaf2302]

I actually found this doing research for a GSXR Kei Van swap I'm working on, I'm hoping that I can get it to sound somewhat more exotic like with a proper car style exhaust rather than the classic liter bike sound.

[@banelba]

OJ, good job. I also have a E39M5 ready to be sent your way for much needed love from you after full engine, transmission, rear diff and suspension rebuild. Just say the world and I’ll send it from the Big apple. Good luck with the Chanel.

[@FluidMotorUnion]

Let us know we look forward to it

[@Victor-t1j5s]

I want a quiet and good flowing, i know i have to compromise but i don't think straight through mufflers will make my exhaust quiet enough

[@DnskiiYT]

I understand it now.

[@RichardCrust]

how about a decent 3.5 ecoboost sounding exhaust? Would love to see that from you guys!

[@alvarohernandez4225]

Masters of their craft. The exhaust work y’all do is amazing. When I boost my car I would love to get a custom mid pipe from y’all. Nothing seems to pair well with my ppe headers.

[@driftsumospeed]

Its way below your pay grade, but id be impressed if you did a full system on a 350z/g35 VQ engine that didn't have any of the typical issues (too loud, terrible tone, rasp, in car drone)

[@FluidMotorUnion]

nothing is below our pay grade

[@yucannthahvitt]

1. Size (the "1" per 100hp" rule of thumb which makes me lol with my 700bhp I6 through a single 3.5" turbo back) 2. Minimize use of bends 3. X pipes make a V engine sound better and improves scavenging 4. Material (he uses expensive stainless) and thin wall 321 sounds better 5. Straight through mufflers and multiple resonators can control drone and sound better than chambered mufflers 6. Weld quality makes it last and backpurged TIG with good fit up makes for a nicer exhaust system and minimizes turbulence in the pipe 7. V bands are better than bolted flanges

[@Pinko_Jess]

Turbos are an exception to that rule, I think. They extract a lot of energy from the exhaust gases, so it’s possible that they’re not moving as quickly in a turbo system

[@yucannthahvitt]

@@Pinko_Jess Mass flow is mass flow. NA or turbo the same gas flow will have the same requirements of pipe size, Q=AV. Post turbo the density of the exhaust flow won't change significantly vs what it would be at the collector of a header in an NA engine. EGT will be a little lower for the turbo engine post turbine vs the NA engine's collector, really the only difference is that the pressure waves and scavenging effects are basically irrelevant after the exhaust exits the turbine.

[@Pinko_Jess]

@@yucannthahvitt good to know!

[@ttinio-jc1fw]

exotic knowledge...

[@barborisov]

So what about a vr6? Should I use an x pipe first and then merge into a y pipe or straight into a y pipe like the factory did?

[@cr500_conversions]

I can't wait to dig into my ATS-V. The Borla system is awesome, but the LF4 has notes that remind me of a Porsche, but the Borla doesn't promote it.

[@wjspade]

I’d love to see you do a video specifically about diesel exhaust systems. I drive a Touareg TDI and there’s a ton of info about exhaust tuning for heavy duty pickups, but not nearly as much out there for European diesel cars.

[@stephencurry8552]

I live in the Southwest. My exhaust systems are in some cases many decades old and are perfect. No need for stainless.

[@HisNameIsTater]

Lol, ok pops

[@stephencurry8552]

@@HisNameIsTater Pops? LOL

[@WaldemarPerezJr]

Alex brought me here. I was just researching after market exhaust for the Mustang.

[@narekpapukyan5455]

The quality of content and knowledge on this channel is unmatched. Also, IMO critical when working with metals that expand due to heat, especially stainless, invest in ADJUSTABLE MEASURABLE torque wrenches & use the proper thread liquid (if/when needed, such as anti-seize or threadLocker) Torque bolts AT spec (not over, not under), in a cross-bolt pattern. Great stuff 👍

[@burcoiu]

Yes ,you teach me about how to do it,but the question I have is can I change the sound if I use a meghafone on my 2 liters engine,4 cylinder this is all I have😢😂,not 8,10,or 12 cylinder,Mazda mx5,NC, thank you

[@rafaelrodriguesdasilva7305]

Do a video on rotary and boxer engines OJ! People tendo to sacrifice performance for the rumble, but on my subarus I always wanted to make my equal length headers, but people around here don't do them... And about rotaries, they are tricky to work when they're peripheral ported, because of the overlapping, and I would like to see you teaching how to extract better the gases out of the chamber with scavenging!

[@MickeyValentineA]

Definitely worth the trip from CA after watching this. Hard to find good people who know what they're doing.

[@mikemakuh5319]

I have trouble with consistency on my welds and being able to see clearly , I loose track of my seams too! ( I have very close seams) I am using 13/4 and 2 inch 304.

[@bogusphone8000]

Solid work as is the standard for FMU. Only disagreement is the X-pipe recommendation. For any large displacement V-8, true dual, equal length exhaust is the best sound. The rough, guttural roar is the brutal cacophony that makes other engines hide.

[@cosmogstr]

One question I have is how does changing the shape of a pipe, for example to oval pipe affect performance and sound? Does it have much of an effect or is it just a little more difficult to work with?

[@jgarzajr2347]

What about the NA 2023 Nissan Frontier 3.8 v6? What size I want to use an H & X pipe for dual exhaust. Any advice would help. It's my first v6 to modify.👍

[@FluidMotorUnion]

Dual 2.5… anything bigger you’ll be dealing with drone and other unpleasantries that won’t equate to power… also.. don’t use a H pipe if you care about it sounding decent.

[@gmsmoker95]

Man, the amount of trial and error i have gone through to get my new Raptor R to not sound like ass and keep quiet mode after doing longtubes is crazy. I bet you guys would have done a much better job and got it to sound better. You guys are less than a 3 hour drive from me too.

[@martynrollinson]

Very informative video... great work!

[@greenman7yyy]

The space I have to use is very limited, it's OK for a single but extremely challenging for a dual set up.

[@astonmarjo]

Please do a full exhaust for my car... Lexus SC 430 our groups would truly appreciate your channel for showcasing the luv we have for our SC Family. Thanks '07 is my model.👏🙏

[@dabjeb09]

New to your channel and very happy to find experts in the field. I will be coming to you guys for my next build. Thankfully not too far away in Ohio LOL. What has been your experience with Venturi pipes? Many years ago, I had a 2007 Mitsubishi eclipse GT with a 3.8 l V6. I built a custom exhaust four times to get it right. Unfortunately it was the year before they switched to a dual exhaust design so an x-pipe wasn't in the cards. In the final build, it was the Venturi pipe that got me over the 300 WHP mark. I was pretty happy getting from 263 BHP to 300 WHP and still being NA. I am glad I stopped there because was starting to follow this wild Russian guy who frankensteined the Evo AWD system into his 4th Gen eclipse and went forced induction. My fabrication skills aren't that good lmao. Neither was the $10K price tab to pull that off.

[@hamletxxx1363]

What do you do for AWD Escalade?

[@MonkInAToliet]

What wall thickness do you recommend for 304?

[@XxXNyMpHoXxX]

Was hoping in hearing a sound clip of that. I wonder how these megaphones would sound on a 5th gen Camaro through a Corsa Sport Exhaust .

[@mur80mur]

So the x-pipe and the megaphone should be as close to the engine as possible?

[@americaoverland]

@FluidMotorUnion 5:20 when you say high RPM(s)... how many K is high? Im curious because I was not going to use an X pipe and instead run true duals with side exits. (N.A. V8)

[@FluidMotorUnion]

True duals is a meme. It’s fine for power but will never sound as good as an x and also cannot benefit from cross bank scavenging.

[@AdrenaLynAMV]

@@FluidMotorUnion Could you tell me please how you would give a V engine a lower pitch sound? I read that H pipe gives you lower pitch and X is raspier and higher. Is it really that restrictive? (2.5 V6 NA engine)

[@AlexJones4PresidentInfowars]

True dual it , mine is fully straight piped and it sounds amazing . But each car is different , I used to run a x and straight pipe and i didn’t like how it sounded .

[@vongdong10]

Would love your thoughts on spintech mufflers. They're kinda like chambered mufflers but use perforated spirals instead. Had them on an monaro (gto) with an LS1, dumped at the diff and my god that sounded incredible.

[@FluidMotorUnion]

Hype. Used them many times and while they do more than many after market options… it’s not better than a high quality straight through design. Think of it like… if a spintech sounds that good imagine what using two super-quiets would be… If there’s a chambered muffler that had a cleaner sound I’d be recommending it.

[@benfowler2127]

Just started the video, but one thing I have wanted for the longest time is a super quiet free flowing exhaust so I can drive a complete sleeper. I do not care for the “louder is better” exhausts that everyone seems to put on their vehicles. I don’t know of anyone that makes a quiet exhaust that gives max performance.

[@MrTheHillfolk]

Ive got an old vr6 12v. It's never going to be all that quick, but they do sound nice with the right system but I didn't want it loud all the time. I placed an electric exhaust cutout before the muffler but after the resonator thats further upstream. It sounds great when it's open,without being too loud and when it's closed nobody looks at you.

[@zacharyzapplesauce]

Fred Armisen never misses 😮‍💨

[@Machinama12]

OJ, that’s a pretty distinct Chicago accent you got there. lol I have a C7 Corvette with a Procharger. My car does NOT have the NPP muffler. I’ve wanted to upgrade to a Corsa NPP system and was interested in your opinion.

[@saulzamora1518]

Hello, thank you for the video it’s very informative. Question, I have a 2023 BMW M550I X-Drive. Would removing the resonators affect the vehicle? What would you recommend? Thank you.😘

[@Lloyd33]

Make the 8.0L V10 (Magnum, not the Viper engine) in my 2001 Dodge Ram 2500 sound good and I'll be impressed.

[@Kumbetli28]

Please explain an anti-reversion chamber

[@FluidMotorUnion]

We’ve done a whole video dedicated to it. You should check it out, but it’s not a must on an exhaust, more of a fancy option that’s takes a bunch of tuning.

[@Kumbetli28]

@@FluidMotorUnion can you share a link?

[@richardward583]

This knowledge is great! Plus it makes sense if you're lucky enough to have a shop near you to get it done. Around where I live the guys lol at you like your speaking Martian or something.

[@amgvlogs5087]

Are there any benefits with making the exhaust diameter bigger then the outlet diameter on a turbocharger?

[@FluidMotorUnion]

Depends how long the system needs to be. It’s smart to step up on cars with power that goes over that rule of thumb, as the length will be contributing to the restriction. So upping the diameter will keep flow higher as long as it’s not too big resulting in a pressure dump.

[@j4ck1eX3]

So what’s the opinion on ovular cross-sections for pipes? I’ve always figured the flow is roughly the same as long as the internal volume is the same as a circular pipe. The only variation I can think of is bending along the long axis of the oval or the short axis leading to different amounts of air friction. Would love to hear more about this since I’m trying to custom fab a flatter exhaust header by using ovals instead of circles!

[@anthonyrita4366]

Better sounding exhaust for subaru cvt since the 2.4 turbo is going into a few vehicles now but still livable because of drone

[@jarebb1]

Thanks for the great videos lately.

[@trixnhoez2964]

Hey OJ, Im curious; is there a rule of thumb that the exhaust should step up in diameter or step down in diameter as you progress from the collector to tailpipe? I'd always grown up hearing the old school train of thought that as the exhaust gasses cool they take up less space so you step down the pipe in size to speed up velocity which kind of made sense at the time but i have recently heard people reccomend stepping up in diameter for optimum performance.

[@jericoproducts6261]

Recommendation for Lexus LS460L. I love the super quiet stock setup, but like the option of switching to a bit louder/deeper sound with something like a Valvetronic unit that bypasses the mufflers. Your thoughts?

[@albertoxp03]

thoughts on exhaust wrap next? i have long tube headers im waiting to throw on my 06 gto