Flewbyu123

I have a 2003 Silverado and a new Procharger not yet installed. Just Pacesetter long tube headers . What size exhaust pipe would you run if you were me? I have 3" Flowmaster high flow cats and 2.5" muffers and X pipe.. Was told today I should stay with 3" all the way... Will the 2.5' hurt my over all HP? Thanks for the help.. Rick.

Blown06

iTrader: (32)

I did the off road pacesetter y into a single 4" and it sounded pretty bad *** to me. Made good power too.

Flewbyu123

Well I guess I will have to go with the 3 pipes, cause I do plan to do a supercharger cam also. Thanks for the advice, Blown06!

George C....

I have 1.75 headers 2.5" y pipe and originally was 3" catback then swapped to single 4"
I use the small p1sc at 12 lbs

I didnt net much gain going to 4" from the 3" since i was limited by blower cfm