I am purchasing an 03' evo this weekend and was wondering which piping size is more beneficial for the stock turbo? I will probably only put intake, downpipe, exhaust, and dynoflash, and maybe some 264 cams.

Does anyone have the HKS hyper exhaust? If so how do you like it?

 

Go 3" from turbo out.

I have:
Perrin Downpipe
Ultimate Racing high-flow cat
Greddy ti cat-back

 

^agreed^ 3" turbo back exhaust Greddy, HKS, Vishnu all great places to get it.

 

I was planning on getting a 3 in turbo back exhaust, but i noticed that other manufactures offer 85mm also. I really like the look of the HKS hyper exhaust, and the HKS ss dp.

 

thats a good system from what I hear. I also hear really good things about Vishnu turbo back exhaust.

 

i read somewhere on this forum that HKS makes a 2.75in dp, but when i go to their site they only offer a 2.55in. What other manufactures offer a 2.75in?

thanks in advance

 

I believe WORKS carries a 2.75" (70mm) dp. Check 'em out in the vendor section!

 

go 3in all the way... there is also an exhaust thread yo can lsten to different systems.

 

i too was thinking about getting 3in all the way back, but when i read some other posts people opt for the 2.75in because they say that it is unnecessary to have 3in unless i plan on extensive modification in the future.

Like i posted before i would like to keep things simple with just intake,turboback exhaust, dynoflash, and maybe cams.

 

Go with the 3" man, join the club! lol

I have:
3" Helix DP
3" UR High Flow Cat
3" JIC SS exhaust with reducer removed

...and I couldn't be happier!