N/A Downpipe Size Question

907mge · 05-10-2010, 12:21 AM

I have a 1990 N/A with a 3in Hks catback(yes I know it is overkill) with a 3in high flow cat. I now have the pacesetter header that after some minor modifications I’m going to install. My question is if I should make the current 2in downpipe for it larger?

05-10-2010, 12:21 AM	#1
907mge 20psi boost Join Date: Dec 2009 Location: Harrisburg Posts: 759	N/A Downpipe Size Question I have a 1990 N/A with a 3in Hks catback(yes I know it is overkill) with a 3in high flow cat. I now have the pacesetter header that after some minor modifications I’m going to install. My question is if I should make the current 2in downpipe for it larger?