i did a search, but to no avail. can anyone tell me whats a good sized piping from the catback with these mods:

JDM 4-1
civicR cams/skunk gears
integraR IM
fpr
vafc
rs-r muffler

thanks for your time.

 

What cat are you using? If youre using the JDM 4-1, Id recomend a 2.5 Carsound cat or a testpipe......then 2.5 b-pipe and muffler. There are various brands of exhaust systems that offer this size such as Kakimoto....Hope that helps..

 

2.5

 

stock ITR bpipe and remove the bottle necks.

 

Yeah I have a 2.5" cat. I was just wondering what the rest of the piping up to the muffler should be. I figured 2.5, but my friend told me it was too big