I want to upgrade to aftermarket cats, perhaps HFC, but I was wondering if I can really get a noticeable amount of gain without a tune if I'm on stock cat-back exhaust, or if a tune is absolutely necessary in order to feel the power increase.

 

5.276whp

 

Cmon man. U sh1tting me? I hope this is a joke if not research mf

 

no need to be hostile, I gave him the answer already.

 

i c ur answer but this guy already got on my nerves when he responded n a thread about HR y pipe and Nismo and he said it wouldnt work. U can only run Nismo y pipe. Obv this guy needs to Search

 

+1. End thread?

 

just search google next time buddy

 

Depends I heard Cheshire cats make the best gains

 

^ you wouldn't even know that they were there half the time!

 

OP, this blog from a Z-oriented performance shop in my area might be a good read:

http://www.zcarblog.com/2008/11/26/p...o-figures.html


Good luck with your choice; personally, I plan to try out the new HR ART pipes once I get my wedding costs taken care of.

 

IBTL

 

One miiiiiiiiiiiiiiiiiiiiiiiiiiiillion horse powah!

(Sorry, been wanting to do that for awhile)

 

ibtl