Exhaust System Upgrade ??

[BLK GTO]

I have and original exhaust system on my 92 twin turbo. What is an ideal pipping 2.5" or 3"Exhaust System Upgrade!! twin exhaust ? Or is it better to go single from cat back ???

[youngvr4]

3inch is best, were actually 2.5 stock if i'm not mistakin. and i went custom 3 inch dual. had it split down about the middle so its kinda y shaped. not sure whats best though.

[talskinyguy]

Twin turbos are 3" mandrel bent stock. N/A's are 2.5 inch mandrel bent. The restriction is your mufflers. Im going to put a dynomax race muffler on mine. $110 for the muffler and custom 3" piping should be under $400. And the muffler is 1333CFM

[darthturbo]

you can get various exhaust from www.3sxperformance.com, they have a 3inch piping 4.5 inch dual muffler exhaust and other things like catalyic converters and shits