What is the difference really sound wise between a 14 and 18" magnaflow magnapack...I'm ready to order a couple 3" inlet/outlet packs but didnt know if there was much of a difference if any at all.
Usually a longer size dictates more resonance which should make a sound a bit deeper. So the 18" should sound like it has a tad more bass to it. Just measure first to make sure that big boy will fit first if that's the one you pick (which it should).