D DanmMh New Member Jul 20, 2011 13 0 1 Nov 26, 2011 #1 Nov 26, 2011 #1 hi, im about to buy my catback from mac, but i just realized that they have the 3" pipe, does any body know which one will give me more HP gain ? the 3" or 2 1/2 " ? ?
hi, im about to buy my catback from mac, but i just realized that they have the 3" pipe, does any body know which one will give me more HP gain ? the 3" or 2 1/2 " ? ?
M mustangjoe02 Member Apr 29, 2011 84 0 7 Nov 26, 2011 #2 Nov 26, 2011 #2 2 1/2 is fine. if you go to 3 in you could lose some back pressure and actually lose low end torque. it also depends on your car. i.e. if your s/c'ed
2 1/2 is fine. if you go to 3 in you could lose some back pressure and actually lose low end torque. it also depends on your car. i.e. if your s/c'ed
D Deleted member 38176 Nov 26, 2011 #3 Nov 26, 2011 #3 3" is more for forced induction cars. Get the 2.5"