changing pipe size

[robert.humm]

i am going to possibly run 2.5" on my bII when i redo the exhaust this coming week or so.. do i need to change the y pipe to a larger diameter, or will it not matter?

 

[ozziemo27]

i am going to possibly run 2.5" on my bII when i redo the exhaust this coming week or so.. do i need to change the y pipe to a larger diameter, or will it not matter?

Are you just doing cat-back? If you just do catback, then its not really going to matter what the size the y-pipe is. Are you redoing the entire exhaust or...???

 

[robert.humm]

i don't have a cat.. it was removed before i bought it. i'm going to run new pipe from the y & put a delta flow 40 muffler on it

 

[danger_ranger_club]

id stay at 2 2 1/4 if you want it for sound.. i straight piped mine with two and a quarter and i wish i would have went with 2 and an eigth. i lost some low end nuts