I recently got a universal cat back exhaust done to my max, form soem muffler place. I baught an OBX Tunable Bomb Muffler to top it off. It sounds good. But i wanna know what would be the difference if i got a greddy cat back, or replace some y or b pipes. Whats the difference is it "just a pipe?" i want my max loud and i want i decently high pitched sound So how would i acheive that? THANX