ive been reading on this site for quite some time now and just wanna start by thanking every1 who posts. all the helpfull info I have found here is great ..now ive read all the tbi mods and done most of them and will soon b installing headers and a cat back system on my 92 rs 305 but i have a few ?'s should i replace the cat with a aftermarket 1 ? and does any 1 have a best bang for your buck set up as far as headers and a cat back system go also what sites other than jegs and summit might i want to look at ? and lastly dynomax has a set up ive found that is very cheap any 1 ever use or hear any reviews on them ? any help would b great .....thanks agian guys

 

i would say eliminate the cat if your state doesnt do smog checks, i have the edelbrock headers and y-pipe and no cat into a 2.5 inch 1 into 2 system (pretty pricey though) i would say try the dynomax