DriveATransAm

i picked up some turndown offroad pipes when i was at flp the other week. will this affect my a/f any? i figure the exhaust opening is far enough away from the 02 sensor that it doesnt matter.

is there such a thing as too free flowing?

DriveATransAm

beuller?

h53speed

You can get step down flanges from one of the sponsors to give you a little backpressure.

DriveATransAm

how much backpressure do i need if im at the track going wot? this is a track only setup.