The custom/aftermarket exhaust thread! [Pics + Videos]

[ryanww]

I have 1.5 Yaris m/t. I'm going to install unichip q+, but I'm waiting for the exhaust set up. I've done porting polish, open filter, megan header, lightweight crank pulley. The megan header outlet is 2". What's the best pipe size and exhaust set up? Is 2" mid pipe all the way until the muffler? Or should i put an oem resonator in the middle? I've tried 1.75" and i put the oem resonator in the middle, but the acceleration was not good. Then i put off the resonator, so it was 1.75" all the way to muffler. It was better than with the resonator. I thing it's because the porting polish maybe. Is there anyone has done some research about the pipe size with piggyback install? How much hp and torque was it?


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[Rakin]

Originally Posted by ryanww

I have 1.5 Yaris m/t. I'm going to install unichip q+, but I'm waiting for the exhaust set up. I've done porting polish, open filter, megan header, lightweight crank pulley. The megan header outlet is 2". What's the best pipe size and exhaust set up? Is 2" mid pipe all the way until the muffler? Or should i put an oem resonator in the middle? I've tried 1.75" and i put the oem resonator in the middle, but the acceleration was not good. Then i put off the resonator, so it was 1.75" all the way to muffler. It was better than with the resonator. I thing it's because the porting polish maybe. Is there anyone has done some research about the pipe size with piggyback install? How much hp and torque was it?


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I have the same engine as you do, I did a full 2" pipe all the way and acceleration was pretty good. Felt decent gains over stock system. I did also remove the cats and put a flowmaster in the process though.

[Rakin]

Just did a full 2" custom Stainless Steel downpipe with flowmaster 40 series endbox. Removed the cats in the process too since we don't have any emissions testing here whatsoever. OEM resonator. Yes I also did the axle-back section too, forgot to take a photo.
It has a very deep tone, but I would like to quiet it down just a little on the low rev range (upto 3000 RPM?), should I put in another resonator or a high-flow cat to town it down? Any suggestions would be appreciated.

[ryanww]

Thanks Rakin. I will try the 2" pipe.


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[powder puff]

The beginning of my custom exhaust. 2.25" × 12" glass pack and a 3" tailpipe. Next step is to go to exhaust shop and have them fab me up a bend with flange to go over the axle so I can weld it all up. I want it to be bolt on so if me or my wife don't like it I can easily swap back to factory

UPDATE: i have everything welded up and put on, will get pics and video next weekend. too dark and windy outside now. plus i still need to take it back off and paint it.

[powder puff]

Got it all welded up and installed, still need to take it back off paint it flat black though. As soon as the video uploads I will post a link

Video link:
08 yaris glasspack: http://youtu.be/DQW0brSTNmY

[tooter]

Sounds really good for a scratchbuilt system.

(Your welding looks better than mine... )


Greg

[powder puff]

Thanks, I'm just a diy guy with no special training with a cheap Flux core welder, lol

[Barneyncp93]

As far as I know, you dont want to have your system move the exhaust slower. So, it's gotta be smaller than most of us can imagine. Smaller diameter is better than bigger, if we have to make a mistake, especially for the street use.

[IllusionX]

Are you going with Bosal/Walker? :)

I waiting to receive me HKS axle back...

[MedMantle]

Custom catback Powerflow exhaust.
rsz_img_20150427_164806.jpg
rsz_img_20150427_164829.jpg

Soon I'm gonna get a Cat put back in the line simply for Highway drone and smell

[tooter]

I like that sturdy support for the exhaust tip.


Greg

[ipwnr]

Scratch build bolt on axleback using another resanator

Using the stock tip

Bird poop welds

This is how it looks from the back

[coheed]

2" straight pipe/ muffler delete. It has more clearance to the bag than it appears to. Made with scraps around the shop with the $90 flux-core Harbor Freight welder.




In car video, audio isn't that great as my camera mount was vibrating and making noise.
https://youtu.be/W4PeHI7ZGmo

0-60/ revving
https://youtu.be/NnYbNGoURN8

[TerenceCruz]

Originally Posted by coheed

2" straight pipe/ muffler delete. It has more clearance to the bag than it appears to. Made with scraps around the shop with the $90 flux-core Harbor Freight welder.




In car video, audio isn't that great as my camera mount was vibrating and making noise.
https://youtu.be/W4PeHI7ZGmo

0-60/ revving
https://youtu.be/NnYbNGoURN8

Dude.. That sounds great Cory!!

[CanadianYaris]

Im looking for a custom full exhaust for a toyota yaris. I dont want any check engine light to come on. Can I remove one of the cats and the resonator, while installing an OBX Header and Axle Back Exhaust without problems?

[CanadianYaris]

Someone has to know if a custom exhaust will throw CEL codes?!?! ^^

[Jerkratt]

Originally Posted by CanadianYaris

Someone has to know if a custom exhaust will throw CEL codes?!?! ^^

If you delete the cat and you just have resonators you're going to have to space out the secondary O2 sensor further away from the pipe to read differently than the one that's in the OBX header. If you go to a good person they should know what to do otherwise you could sort out a spark plug non fouler or I'm sure they sell 02 spacers on eBay