N Nsrrider Joined Dec 2011 16 Posts | 1+ Oregon Discussion Starter Feb 25, 2012 #1 duz anyone know if the diameter of the OEM header pipe is the same as that of the aftermarket headers? specifically, i'm wondering if there would be any benefit to modifying the OEM header with a "bomb" or bulge? thx
duz anyone know if the diameter of the OEM header pipe is the same as that of the aftermarket headers? specifically, i'm wondering if there would be any benefit to modifying the OEM header with a "bomb" or bulge? thx