Hey Guys,

Kind of new to this forum and DEFINITELY new to the B-series engines. My question has to deal with exhaust size piping. I am putting in an LS/Vtec swap into my 3rd gen Accord (see sig).

My engine set up:
B18A1 Bottom End w/ Z10 Block Girdle
Shotpeend LS Rods
Arias 11:1 pistons
B16A1 Vtec head
CTR Intake Cam
ITR Exhaust Cam
ITR Valve Springs and Retainers
B16A1 Intake Manifold
B16A1 Ported Throttle Body

with my current A20A3 engine I have the usual 2.25" cat back piping. With this new set up should I keep the 2.25" or upgrade to a 2.5".

Sorry if this is a repeative question for you guys