2000v6cam

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

Bernotas05

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.

paarman97maro

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

Amurican_Muscle

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.

paarman97maro

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.

archemedes

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)