Clearly both are important but what was lacking that drove you to upgrade your exhaust?
Oops sorry, I meant exhaust.. seemed to delete that word in my edit lolupgrade which? Engine, intake, or (most likely) exhaust?
I didn't like the anemic sound of the stock exhaust. But my exhaust choice was largely driven by eventual power goals and maintainability. Exhaust which breathes well frequently sounds good as a bonus.
I don't consider the headers and CAT to be the exhaust (most people only replace the cat back exhaust section here)... I would agree that a new tune and better headers / cat delete will give you more power though.Me!,
Look at the difference (hp and hardware) between the katana2 kit, and the katana265 kit. It is hard to get much HP difference with exhaust on a normally aspirated engine, but the difference can be bigger on a supercharged car.
Don't forget that I lost about 20lbs by getting a new cat-back exhaust! I mean you are right about the power... But I would say 75% of the people here haven't touched the cat or headers due to legality issues / smogging and the high prices of aftermarket headers.I don't consider decat and headers to be a "cat back exhaust", but they are definately a major part of your exhaust system. Many would say the most critical areas of exhaust power loss are the headers and cat/decat. However, for those *just* changing the cat-back, sound would be the principal reason, as few real power gains are realized with just a cat-back system.
I know you were doing that, and it was gentlemanly of you to word your post the way you did.Sorry for the obviousness Holmz, I just wanted to deliniate the elements of the exhaust with clarity. It worked into the discussion where power gains were found in the entire exhaust system. The root poll question centered around "did you change your exhaust for power or for sound".