LOL! true I hate the crackle when you let off the throttle but I know some that really love the sound, IMO that crackle as you put it sounds like ****, but each to his or her own. I like the sound of a catted flowmaster setup but that is what I like and everyone has thier own opinion.the rule of thumb is smaller pipes with be more high ptched and you'll get that horrible crackling sound and bigger diameter pipes give a deeper throatier sound. I reccomend 3.5" tips. My car has 3" tips and they look too small.