We Build the BEST Supra Downpipe

[@hahaha12345678993]

pt and dp are so lucky to have these guys work on their ride

[@VibrantPerformanceTV]

Absolutely, and we are lucky to have them drop off their cars and share with the world with what we do

[@hahaha12345678993]

the guys is so modest, made that piece of art and he says i think it turned out ok

[@VibrantPerformanceTV]

:D

[@channheng5197]

He is canadian, that's why :)

[@speedacademydave]

Measure once, cut twice! I taught you well, A-A-Ron!

[@jeffreylyons1531]

Do not stop making these. Epic 👍

[@VibrantPerformanceTV]

Thank you for the support Jeffrey!

[@StreetShamann]

I’ve watched at least 100 videos on people making exhaust and down pipes. I’ve learned more in the first 17min of the video than ever before.

[@VibrantPerformanceTV]

Really happy to be able to provide that information to you! Happy to see you here.

[@ShibbyImpalaShibby]

Welding the edge of that flexpipe is such a great idea. I wish I did that on my 64's exhaust system. It was tough to get a nice weld with all those layers.

[@hahaha12345678993]

impatience is the shadow of desire

[@getweir_d]

stolen from: The Book of Secrets.

[@y.b.-]

Outstanding work, you should keep blueprint of this one cuz I am sure some supra owners are going to be interested in getting it

[@satanaz]

awesome content guys!!! I'm happy that Speed Academy sent me here!

[@VibrantPerformanceTV]

Really happy to have you here for the ride

[@rlscustoms]

Man watching you weld while listening to you explain it all is like therapy, simply amazing!

[@BIGGELATO]

"Measure once, cut twice" 😂😂

[@VibrantPerformanceTV]

😂😂😂

[@justainereid5]

Love this...really encouraged to jump into fabrication again and i love these things so much.

[@VibrantPerformanceTV]

You absolutely should! One of the best skills one can have when doing a ground-up build or something completely custom like a unique swap

[@DBatty]

Watching this is a form of meditation. 👌🏻

[@BjornFSE]

bEEN wAITING On this Look forward to the Intercooler Side. Nice work on the Exhaust Side..........

[@VibrantPerformanceTV]

Coming soon! :) Thanks for watching

[@agtronic]

Aaron! Blast from the past. Miss the world...

[@OliverRivettCarnac]

Awesome work! Any reason you go from a 3 inch outlet up to 4 only to go back down to 3 in the exhaust? It is heat of the exhaust gas that needs the extra volume and then no longer when it increases in speed and cools at the catback?

[@justfiive]

That's my question too. Seeing the earlier videos, I assumed they were going 3-4 because that's what the catback was. Now seeing that it's a 3 inch catback, I'm confused. Maybe it's for adding extra volume so the recirc doesn't interfere too much with the exhaust gas coming out. I have no clue though, I'm not a fabricator.

[@getweir_d]

Hey Oliver, Dave and Peter had done some research and requested the downpipe to be 4" to provide ample space for the turbo to spool really quickly at the bottom end. When it begins to spool, it wants extra space to spin exhaust gas into without any significant restriction. The neck back down in size is simply to mate to the exhaust they have on the car already. The 3" connection is the only point of the system at that size. If you fast forward to about 29:00 you can see the exhaust steps up to 3.5" right after the flange and it also steps up again at the rear axle to 4". The whole assembly could be considered a long venturi where there is a smooth gradual increase in size to allow exhaust gases to expand and cool, then gradually squeeze them into a smaller diameter to increase velocity, then again open into a larger volume slowly to promote more flow. I'm sure an engineer could explain it better than a fabricator.LOL

[@OliverRivettCarnac]

@@getweir_d thank you so much for the reply. I presumed there is probably an excellent reason for it and was genuinely intrigued about the engineering behind it. It so often ones intuition about something is not that accurate. Awesome looking piece and excited to see how it performs!

[@danieltubbs5422]

@@getweir_d OK, I was going to ask the same question. I'm no engineer but what you say at least makes sense in my brain.

[@Skirk84]

He really needs to start at 4" and then go back down to 3.5" or 3" for the rest of the exhaust, thats where you will see the gains

[@doeieeh]

Truly amazing fabrication work, explained so calm. Very nice video!

[@keshav4324]

After watching this step by step I feel like I could do one myself. Interesting and full of information video

[@doggothedog7744]

Watching you make that down pipe was so juicy. I learned a lot too. Very informative. Such a great video.💜

[@bakamotorworks505]

I like this guy, “live in gratitude” on his arm. Fantastic fabrication. Speed Academy are definitely lucky to have Vibrant Performance weld them up a bespoke downpipe. Turned out amazing 👍🏻

[@getweir_d]

Thanks!

[@2THGap]

That's beautiful. You're a master in your craft. Looking forward to the finished product. - from a former Albertan. :) cheerts.

[@jyaj007]

Awesome it really shows the fab skills

[@dakavanagh]

Beautiful work! I would love to hear more about velocity and back pressure given all the transitions in this pipe.

[@fifaaddict101]

great video! hope your channel continues to grow. Much luck guys

[@curtism6801]

Ive been following this project since day one! absolutely love the progression and hope to do this myself one day... man to own a supra... nice job guys!

[@VibrantPerformanceTV]

You definitely should! The Supra's are such nice cars and such great icons

[@BjornFSE]

day one lol. It's not exactly the longest existing project.. I feel you though, Same. haha

[@HugoHardinge]

Noticed you guys used a GESi high flow cat! Love that they are local as well and make amazing products like you guys, nice work!

[@VibrantPerformanceTV]

They are definitely a really good product and good for the environment too!

[@HugoHardinge]

@@VibrantPerformanceTV Captain Planet would be happy! I run one in my downpipe as well

[@MidwestDoublEEngineer]

So enjoyable to watch an expert fabricator

[@TheGCJourney]

AMAZING WORK! Question: Wouldn't it be safer to add exhaust hanger supports to such a large downpipe so that not all the weight and stress are hanging on the turbo?

[@thenjmway]

I always add gearbox mounts before the flex on my systems so the down pipe engine and gearbox can move as one. I find this is the best way to minimise vibrations as well as increase longevity

[@therealboofighter]

As others have said, well done. No drama, just beautiful work.

[@johnshaw3208]

Absolutely beautiful.

[@DaBlueMonster]

This is fab work at its best. Bravo!! 💯🏆👍🏻👍🏻

[@VibrantPerformanceTV]

Thank you, and thank you for sharing our video on other social platforms

[@MrSneakA]

Very nice CAD design.

[@mattkrazit6414]

Appreciate the walkthrough. Thanks for not editing out the audibles -- those are where I learn. Also appreciate your product lines. My K-swapped NA Miata was made possible by your -AN plumbing and rough exhaust components.

[@louisroutier]

This video was therapeutic! Amazing detail, thorough explanations. Can’t wait until the intercooler video!

[@flolegrand44]

Wow, nice build, it looks amazing! Learned few things today I will use to build my downpipe on my K-swap WRX!

[@VibrantPerformanceTV]

That's a really cool and unique swap, thanks a lot for being here and watching

[@jp2246]

That was 36 minutes of awesomeness 👍

[@kreparAZ]

really awesome video guys! very cool to see how it was made.

[@VibrantPerformanceTV]

We love showing how it comes together, thanks for watching

[@ryandee4255]

Good products, knowledge and skill. Really clean shop too!

[@VibrantPerformanceTV]

Thank you Ryan! A clean space with proper organization helps get the job done faster!

[@LessTalkMoreDelicious]

Amazing craftsmanship! 🙌

[@spazda_mx5]

Great work!

[@AZ-hf9ow]

Nice 👍

[@hyper8545]

Great work on the SA supra dp 👏 👌

[@72Birel]

Would be great for you guys to provide a final list of part numbers used and cost.

[@VibrantPerformanceTV]

We will have a parts list available with ALL part numbers in the last video, we can update the Description as well in this video once we compile all that for you.

[@michaelallen2501]

Used your products to design and build a closed loop catch can setup for my supercharged 97 Camaro. Hoping to score a TIG welder so I can use your products to replace the charge pipes with aluminum and build a custom titanium exhaust.

[@VibrantPerformanceTV]

Appreciate that, and happy you like the products. Owning a TIG will change your life, we see it over and over with so many builders

[@chadlegault9993]

Great video, thanks :)

[@xozindustries7451]

Good job!

[@slicktop2jz855]

Looks great. Ive done one very similar on mine, yours is cleaner, tho.

[@VibrantPerformanceTV]

Would love to see yours, tag us on social when you get a chance

[@slicktop2jz855]

@@VibrantPerformanceTV Lol I would mate but I dont partake in social media aye 👍

[@JeepingMo]

Great job, good video.

[@Ed-wr3wv]

Love the video!

[@alleybuilds5370]

I just want to start by saying this work is top notch! that being said... There is absolutely no reason 4" pipe should have been used. i know its what the customer wanted. With all the transitions its going to make the exhaust gases not laminate. It would be different if the cat back was 4" but since it's 3.5", from the turbo should have been one step and then 3.5" all the way back.

[@Skirk84]

I think you will find if you have done your own testing that 4" straight out of the turbo even if only for the first 1meter of exhaust and then steeping down into a 3.5" or 3" gives massive gains over having a 3.5" or 3" straight out of the turbo. On a single turbo setup like this on a supra you can expect to see 250rpm faster spooling time, more throttle response and low down torque as well as gains over most of the rev range. Me personally I gained 30kw from 1500-4500rpm and then 40kw from 4500-8500rpm going from 3.5" all the way through to 4" dump and mid, meaning straight out of the turbo and then all the way to the cat or to the end of the transmission. The exhaust temperatures cool down very fast, for example you can see around 750C temps in the turbine housing, and then barely 200 degree's exiting the rear of the car. Meaning the expanded air condenses and takes up much less space as it travels down the exhaust. The thing he did wrong is going from 3" to 3.5" and then 4" a foot down the dump pipe, at this point he may as well kept it 3.5" for the whole thing as he has already ruined the largest part of the gain. 3.5" all the way is fine, but 4" dump will give noticeable gains. You will also find 3" limits your power to around 400kw, 3.5" limits it to around 600kw and 4" can do around 800kw before posing a top end restriction in terms of your catback size.

[@azndreamers209]

I don't own a supra sadly but I do own an 19 accord sport 1.5 and I just bought the vibrate resonator and 2 streetpower mufflers. Still waiting for the mufflers to come but I'm excited about it!

[@beachboardfan9544]

Wow an exhaust build on youtube where someone is finally using tubing instead of schedule 40 pipe! Bravo!

[@zeroyon4562]

Why would someone use sched pipe for a downpipe? That’s just silly lol, it’d weigh a tonne!

[@beachboardfan9544]

@@zeroyon4562 Agree. But youtube is full of ppl doing it.

[@ryanprettyman3123]

Wow, Holly Crap! Time to build a turbo kit for the Ram!

[@multipurposepaperbox]

something, something, spinach, forearms something, daaaang

[@arumrunner]

Great job on the fab and welding. Any provision for a hanger on the underfloor segment?

[@getweir_d]

Hadn't done a Supra downpipe before and didn't see any hanger provisions around the transmission/subframe. There were hangers on the cat-back exhaust.

[@BIGGELATO]

17:51 The astronaut is talking 🤣 all jokes aside tho, the attention to detail and fab work is amazing as always. Well done!

[@VibrantPerformanceTV]

haha maybe we'll make a meme and drop a background in next time to have Aaron welding in space

[@BIGGELATO]

@@VibrantPerformanceTV Galactica Edition, with a galaxy background, Aaron welding a titanium downpipe on a space ship 😂😂 outta space, one stop weld shop

[@VibrantPerformanceTV]

@@BIGGELATO haha As long as he's got argon, he'll weld anywhere!

[@BIGGELATO]

@@VibrantPerformanceTV can't forget the V-bands

[@richardledesma1675]

This was such a dope video man! The exhaust came out beautifully, but one thing I never understood is the reason for having a 4 inch chamber in the exhaust if the catback is a 3 inch and so is the turbo turbine housing, wouldn’t it flow better if it was uniform? If anybody has knowledge about the optimal flow or why this was done please enlighten me

[@TJSpartan008]

I had the same thought throughout this whole video. It's only gonna flow as well as its smallest diameter so why make the monster dump if you're not gonna take it all the way out the back?

[@richardledesma1675]

@@TJSpartan008 I’ve also seen aftermarket downpipes that go from the turbine house diameter all the way down to stock exhaust diameter, but those are usually for sleeper cars that want a sound and power increase but this one I was still confused about

[@Skirk84]

Yes it is necessary for good performance. You will find if you have done your own testing that 4" straight out of the turbo even if only for the first 1meter of exhaust and then steeping down into a 3.5" or 3" gives massive gains over having a 3.5" or 3" straight out of the turbo. On a single turbo setup like this on a supra you can expect to see 250rpm faster spooling time, more throttle response and low down torque as well as gains over most of the rev range. Me personally I gained 30kw from 1500-4500rpm and then 40kw from 4500-8500rpm going from 3.5" all the way through to 4" dump and mid, meaning straight out of the turbo and then all the way to the cat or to the end of the transmission. The exhaust temperatures cool down very fast, for example you can see around 750C temps in the turbine housing, and then barely 200 degree's exiting the rear of the car. Meaning the expanded air condenses and takes up much less space as it travels down the exhaust. The thing he did wrong is going from 3" to 3.5" and then 4" a foot down the dump pipe, at this point he may as well kept it 3.5" for the whole thing as he has already ruined the largest part of the gain. 3.5" all the way is fine, but 4" dump will give noticeable gains. You will also find 3" limits your power to around 400kw, 3.5" limits it to around 600kw and 4" can do around 800kw before posing a top end restriction in terms of your catback size

[@mmmbetter55]

That's a pretty baller piece you have made there sir!?

[@janeblogs324]

Define best...

[@wdiv]

I knew that was a FUPA cup! 🤘

[@feelthatfeelthat]

That thing is THICC. JEEBUS. What kind of power goals are they aiming for?

[@VibrantPerformanceTV]

somewhere around 500-650ish, the setup is intended to make quick spool

[@Dense147]

Drink a beer every time he calls the tube a pipe.

[@zeroyon4562]

One of my pet peeves, and it’s not uncommon unfortunately. I work in the dairy fab industry and hear tube being called pipe all the time.

[@gman3725]

Welding god!!

[@douglaswood6587]

Good shit

[@vin605]

Good job looking really good, my question is shouldn't the cat be removable with flanges if it goes bad in the future with out cutting it off

[@VibrantPerformanceTV]

With a proper tune, the Catalytic should not be going bad. This Catalytic are high performance units made to handle high horsepower as well, since they have Stainless internal substrates

[@mikeduwe]

On the flex: which was better, the one you welded the edge before welding to the pipe, or the one you left alone?

[@VibrantPerformanceTV]

Hey Mike! It is really just personal preference, both approaches get the same result when done with care. If it is your first time welding one, fusing the layers together may be easier and help ensure all the layers are captured in the weld. 1/16” filler is recommended to fill the fillet nicely and keep the puddle from overheating and risk the bellows plies from shrinking away from the weld. A good video on welding them is here: kzbin.info/www/bejne/hHmaqnRoht5riqs -Aaron Weir

[@mrmidnight32]

Who else is here from Speed Academy? 🙋‍♂️

[@ishowspeed5167]

can you make downpipe for golf 5 gti 2.0tfsi with Tial wastegate dump pipe weld in downpipe like in this video ? if you can thanks a lot

[@GuyX2013]

Feed it to the catalytic converter? Make it vband connected 😉

[@coreyscarrepairs]

Hello, Vibrant! I was wondering if you could use your influence to convince Tuxedo lifts to make some adjustable lift pads (screw up and down) and also to convince them to sell symmetrical arms (by themselves) for the overhead 2 post lifts. I have the same lift at home and its a little bit frustrating for certain cars to get them perfectly level with the lift pads and extensions provided. Additionally some baseplate extensions would also be cool for people in situations where they don't quite trust their concrete with the small baseplates these lifts have. Perhaps maybe even you guys could design some of these things?

[@VibrantPerformanceTV]

We would highly recommend contacting the company directly, we have no contacts with them. Unfortunately we do not specialize in lift equipment either, so we will not be able to help you with a new product idea.

[@franciscovasquez4555]

So what's your setting on your welder?

[@getweir_d]

Maximum amperage is 70amps for most welds. No pulse on this downpipe. Argon at around 25CFM with 12 second post flow.

[@TheKomar924]

I have not seen any down pipe mid pipe in this configuration before. 3->3.5->4->3. Usually all the same size 3 or 4 the whole way. Any insight to what made yall go this route? Limited material? Limited parts availability? I am super surprised you did all that work just to neck back down to a 3inch. Although the pipe reduction transitions are smooth what kind of pressure delta will be had? Thanks for the in depth video!

[@Skirk84]

4" straight out of the turbo even if only for the first 1meter of exhaust and then steeping down into a 3.5" or 3" gives massive gains over having a 3.5" or 3" straight out of the turbo. On a single turbo setup like this on a supra you can expect to see 250rpm faster spooling time, more throttle response and low down torque as well as gains over most of the rev range. Me personally I gained 30kw from 1500-4500rpm and then 40kw from 4500-8500rpm going from 3.5" all the way through to 4" dump and mid, meaning straight out of the turbo and then all the way to the cat or to the end of the transmission. The exhaust temperatures cool down very fast, for example you can see around 750C temps in the turbine housing, and then barely 200 degree's exiting the rear of the car. Meaning the expanded air condenses and takes up much less space as it travels down the exhaust. The thing he did wrong is going from 3" to 3.5" and then 4" a foot down the dump pipe, at this point he may as well kept it 3.5" for the whole thing as he has already ruined the largest part of the gain. 3.5" all the way is fine, but 4" dump will give noticeable gains. You will also find 3" limits your power to around 400kw, 3.5" limits it to around 600kw and 4" can do around 800kw before posing a top end restriction in terms of your catback size

[@aaronb1320]

I think we need to send that Aaron bloke to Australia, to dome fab work on some other Aarons car.... ;-)

[@getweir_d]

Yes please!!!

[@asaincargarage13]

Where do you get those turbo cast manifold? I want to buy one for my supra. I hope is stainless steel.

[@HankookCarbonWRX]

Drift HQ are a dealer

[@BIGGELATO]

if it all starts at 3 inchs, whats the point in going with 4?

[@TheDarkhorse82]

Customer wanted it

[@BIGGELATO]

@@TheDarkhorse82 is there any benefits?

[@TheDarkhorse82]

@@BIGGELATO turbo is able to spool up quicker as there is extra room in the exhaust chamber to compress the gases rather than it being restricted by a single diameter.

[@BIGGELATO]

@@TheDarkhorse82 back pressure and restriction is much of a difference when going 3 inch to 4 inch, were talking such a little amount that it wouldn't and shouldn't matter unless you are in racing; drag or drift. But this is for a 600hp build from what the guy said. anyway don't matter, customer wants 3 to 4, customer gets 3 to 4. Whatever helps them sleep at night

[@akarilotube]

So if the exhaust housing has a 3" outlet, how beneficial is it to actually have a 4" downpipe? Not trying to bust balls, just genuinely interested in the theory behind this. Kick ass fab skills none the less.

[@chubbylee240]

So it goes from 3" to 4" to 3"? Why not match the whole exhaust?

[@brbk4498]

I was about to write this. Hopefully someone answers

[@EatSleepDrive]

The section they stepped up to 4" is the cat section. A 4" cat will flow better than a 3" cat. All boils down to reducing restriction within the exhaust.

[@TheNiters]

I was also wondering about the same thing. I guess the exhaust will cool down as it travels down the downpipe and through the cat. Having a 4" cat means better flow at that point and it's possible that the temperature difference in the exhaust gases is enough to not really make the 3" cat-back too restrictive (since cooler air takes up less volume). It's also possible they had a 3" cat-back they really wanted to use and just said "Fuck it. Let's follow the dude's advice about the 4" downpipe, but step it down so we can use the cat-back we have". Would be cool to see if they did any specific thinking around this, or if it was a bit of an "accident".

[@Skirk84]

You don't need to match the whole exhaust, because the gas cools down significantly as it passes through the exhaust, therefore you want the largest diameter first to have an "equal" flowing exhaust, if you do 3.5" all the way through you will have your dump pipe being the first place of restriction and see good gains from stepping up to 4" straight out of the turbo even if only for 1 meter. 250rpm better spool, power increase over the whole rev range. and as EatSD mentioned a larger cat to reduce the amount of flow the cat loses is a great idea. 4" dump, 3.5" the rest of the way and 4" cat would be a good exhaust. What he has done with starting small and going larger is wrong and wont help at all, may as well have kept it 3" after that point. the only benefit might be having a larger area for the wastegate to be plumbed back into before the exhaust cools down.

[@jamest5149]

Just a though, instead of welding the wast gate extension to the manifold, you could have welded a V-band clamp at each end of the extension… or was it to short? I don’t like welding cast due to risk of cracking.

[@ΘάνατοςΧορτοφάγος]

In this cas, the cast if completely new and freefrom dirt and oil. And if ypu heat it up properly, it shouldnt be a problem

[@getweir_d]

Hi James, I had considered going that route. Peter wanted to keep it simple (fewer clamps) and weld straight to the manifold. I was comfortable having done similar in the past on turbine housings and other manifolds so we decided to go that route. As Thanas mentioned, cleanliness is key and pre-heat does help to burn off any impurities like oil or other fluid that can contaminate the weld puddle. I use a 309L filler for 304 stainless to cast MS and did the same with this stainless manifold.

[@PANTYEATR1]

it's my obituary option or ignorance, but is a 4" down pipe really necessary? i know that's what Speed Academy wants, but the rest of the exhaust is 3". personally i would have done a 3.5" exhaust. plenty of flow is available with 3.5"...great video, i enjoyed it💪

[@Skirk84]

Yes it is necessary for good performance. You will find if you have done your own testing that 4" straight out of the turbo even if only for the first 1meter of exhaust and then steeping down into a 3.5" or 3" gives massive gains over having a 3.5" or 3" straight out of the turbo. On a single turbo setup like this on a supra you can expect to see 250rpm faster spooling time, more throttle response and low down torque as well as gains over most of the rev range. Me personally I gained 30kw from 1500-4500rpm and then 40kw from 4500-8500rpm going from 3.5" all the way through to 4" dump and mid, meaning straight out of the turbo and then all the way to the cat or to the end of the transmission. The exhaust temperatures cool down very fast, for example you can see around 750C temps in the turbine housing, and then barely 200 degree's exiting the rear of the car. Meaning the expanded air condenses and takes up much less space as it travels down the exhaust. The thing he did wrong is going from 3" to 3.5" and then 4" a foot down the dump pipe, at this point he may as well kept it 3.5" for the whole thing as he has already ruined the largest part of the gain. 3.5" all the way is fine, but 4" dump will give noticeable gains. You will also find 3" limits your power to around 400kw, 3.5" limits it to around 600kw and 4" can do around 800kw before posing a top end restriction in terms of your catback size

[@PANTYEATR1]

@@Skirk84 thanks for your input. i haven't even drove one of these Supras before and I've never tuned on them. you have interesting information tho.

[@kakanator]

awesome work but its a shame its 3 to 4 then back to 3. Its a lot of money in 4 inch pipe and parts to not be a true 4 inch turbo back.

[@Overseerdv]

@Vibrant Performance TV you may have had this request many time over already, though I have the same turbo and manifold; can I commission you build be a downpipe like this, and with or without the car being in the shop??

[@xozindustries7451]

Why wouldn’t you just use two v band clamps for the manifold to wastegate instead of welding the schedule 40 to the manifold?

[@jeancharlesrabaux5658]

Et dire que j en et vue une moteur ls3 juste nos il c est fait en fumer alors que le 2jz stok peux atteindre 800 ch d origine sans tout demonter un turbo un stage 3 et y en a asser

[@JP2JZ]

Welding art/porn right here. I too am here from Speed Academy and I'm following very closely to see what I can do with my Supra. Looking forward to seeing the next installment.

[@emmanuelmorales4121]

So 3" v-band outlet to 3.25" 90 degree to 4" flex to 4" pipe then bolt onto a 3" catback? Why does this hurt hy brain so much? Is that really normal? How does it effect exhaust velocity?

[@shiftdowntv4511]

I'm not an exhaust guru, but it seems strange that it necks down from 4" to the 3" catback section. Was that the direction from dave?

[@HankookCarbonWRX]

Because they want to run the HKS cat back exhaust

[@beezowdoodoozoppitybopbopb9488]

I dont understand the purpose of an EPA approved replacement catalytic converter being installed when theres only one. The car came from the factory with two, so it's still illegal regardless, unless I'm missing something. Am I?

[@Skirk84]

oh well, maybe the rest of the build will make up for it

[@TJSpartan008]

I don't understand the point of going for a 4 inch dump if you're just going to restrict it back down for a 3 inch catback. You're not gaining the flow of a 4 inch unless it's 4 all the way out the back of the car. Why go through the trouble?

[@itsjussjerry]

What’s the point of going from a 3 inch outlet to a 4 inch downpipe if it’s going to bottleneck back to a 3 inch exhaust?

[@Skirk84]

@@BrettObie but not smaller, and then larger 1 foot down the dump. Should have gone 4" straight off the turbo

[@joshblount133]

Is there a reason that something like this couldn't be made out of titanium? I have a titanium exhaust from the downpipe back on my car, and I'd like to use titanium all the way from the turbo.

[@VibrantPerformanceTV]

It is possible, but there's a few reason we chose stainless. Firstly, Titanium is super light but also very expensive. Since Speed Academy isn't going for the lightest possible car but rather a street car, we chose Stainless to appeal to the masses. Secondly, we don't necessarily think Ti (1mm thick) is ideal for a downpipe due to the heat coming out of the exhaust housing. You may see premature failure, or cracks due to the material being so thin - just a warning.

[@joshblount133]

@@VibrantPerformanceTV Thanks for the explanation...I wondered if heat was an issue for Ti, and the reason that I haven't really seen any Ti downpipes.

[@Jdmjunkie001]

@@VibrantPerformanceTV I have always viewed titanium exhausts as a wear item.

[@getweir_d]

@@joshblount133 Titanium degrades quickly at 1100F. 👍

[@VibrantPerformanceTV]

@@Jdmjunkie001 one at very high temperatures, if you have it downstream or post-cat, then you're perfectly fine

[@avanjob205]

" ...that is alot of pipe to fit into that space .." me : THAT"S WHAT SHE SAID :D ps; yes , i have a mind set of a 12yr old sometimes ...

[@therealboofighter]

My 12 yr old brain responds yo your 12 yr old brain “ you wish she said that”.

[@SIRICKO]

The outlet of the turbo is 3 inches making the piping open up to 4 inches is pointless there's no performance gain doing that. Nice build tho.

[@Skirk84]

Yeah correct, he needed to go 4" straight out of the turbo then step it down after the dump pipe to see any gains using the 4" pipe.

[@atanaspopovski3770]

What is this? Ask some engineer what did he think,about this stainless pot!?!? If you want more drum make it straight...and you will make 2 hp more!!! if you see that design somewhere around the world in stock car or profesional build race car,let me know please!!

[@martinmo195]

Why go the trouble of making 3.5" - 4" to 3"? Why not Just go 3.5" downpipe to 3"? 4" is so short it cant be doing much?

[@BUZDRIFT]

Dude almost fkn pushed himself through the bandsaw! FFS! lol WG dump tube not critical, dudes fkn high AF!