I ITHURTZ Member : 2006 Mazda 3 S Apr 23, 2010 #1 Need flow opinions. Would 2 2.5" sprial flow mufflers on a 2.3l restrict flow to much? (on a 2.5" exhaust) For anyone who dont know about them, they are 1.5" straight through in the middle, with spirals on the outter side.
Need flow opinions. Would 2 2.5" sprial flow mufflers on a 2.3l restrict flow to much? (on a 2.5" exhaust) For anyone who dont know about them, they are 1.5" straight through in the middle, with spirals on the outter side.
