i agree stock cats do flow fine but if u have to get something then id go high flow instead of gutting it and i think i may be the only one but i really like flowmaster

Its everyones opinion on what sounds good, ad i say leave the cats on, the only reason i took the cat off my bronco was because it got clogged up bad i got up to like 45 max up hill it was bad so that thing got hacked right off, but i wish i would have put a univerasal one on there or somethin now instead of welding a straight pipe becuase, it smells like **** bad i had the top off in the summer and i had a headache and a half from them fumes.

Thats your brain cells dying... wait... that explains... nevermind :nana:

So you guys are saying get all new headers, catback, and keep the old cat ... So I would receive no HP gain from a high-flow? Would the old cat still work if I wanted to get 3"?

BTW, did anyone come to a conclusion whether 2.5 or 3 was better or is it still faught about? Honestly I don't have any idea which one to pick, so if a couple really smart camaro guys of wisdom say one or the other, I will go for it. :p

If its a stock cat it wont work with 3" exhaust. Stock piping is 2.25". I dont think a high flow cat is gonna be worse than a stock cat, it should be practically the same.

As for what is better, 3" or 2.5... I think 2.5 would be better for a v6. I honestly dont think it will matter, youll just run into clearance issues because 3" is made for the v8.

on the GP zzperformance found the stock cat was faster than a high flow (was a cheap off brand that was made in china) (granted that's the gp but still a good representation)