does the evo 2 add hp? if not whats a good quiet street legal exhaust that adds good performance?

 

I just installed the EV02 on my '05 STI, and it's very quiet, especially compared to the Perrin twin tip TBE I just took off. Check with Gruppe-S at 510-783-5300. They did mine.

 

I have the Greddy SP2. It is a very mellow growl that gives good performance. I luv it. I heard the EVO2 is louder than the SP2. Anyone have any feedback on this?

And to answer your question i think the real horsepower gain from exhaust comes from a tune.

 

yo check out JSCSPEED.com they have lots of selection for exhuast! they have a Graph to show you from quietest to loudest exhaust, pretty cool..check it out! PLUS they have some good prices and free shipping!

 

The Greddy catbacks sound great. My buddy used to have the Greddy evo2 on his wrx and Ive heard scarface's Greddy on his STi. Both sound awesome.

A helix catted downpipe and greddy catback would be my second choice...if I didnt get my TurboXS turboback.

Catbacks alone dont really ad hp...5hp maybe. Downpipe and tune is where the power is.

 

I put on an EVO2 a few weeks ago and can't say I feel too much difference. I was more concerned with the sound so that I can hear it with my helmet on at full-chap. It sounds really nice.