Ok i currently have Flowmaster Cat-back exhaust for my 99 3.8L V6 Camaro. I will be getting Pacesetter Chrome Hearders (w/y pipe) very soon. I want to have the complete exhaust running bigger tubing. My flowmaster pipe is 2.5". My question is from the y-pipe to the cat and the cat to the flowmaster would still be stock tubing. Is thier someplace that sells that section with a high-flow cat or could i bring it somewhere and have them run bigger tubing in that area with the stock cat. I looking to have the entire exhaust 2.5" if possible. Thanks

 

i think magnaflow has a high flow cat out, that is pretty much generic for GM's