I am in the need of an exhaust on my ITR
I have skunk2 stage 2 cams, gears, springs, retainers, vafc, aem intake, and jdm header. Just wondering if the Greddy Evo would give me any extra whp gains. I made 181 whp on teh dyno, but everyone has told me that I need an exhaust, just wondeing if the evo would help me.(I am getting a good deal on it.)(USED)

Thanks

 

Not very much.

You should see similar gains by removing the bottleneck in the OEM b-pipe (near the converter).

The Greddy Evo has the same bottleneck, and the piping is only 2mm larger than stock.

 

You could try picking up some custom piping from Kteller8.

comes in 2, 2.25, and 2.5" then you can use a custom cat http://www.accordinglydone.com...id=71 to get rid of the bottle neck. Also, you can run whatever muffler you want.

I just ordered mine and plan on running T1R muffler, But w/JDM DC 4-1 Header and 2.5" Carsound cat. You can pick up alumunized (sp?) steel for 185+shipping which is pretty cheap IMO, or you also have the option of Stainless. http://www.accordinglydone.com...id=66