question about exhaust please read!?
question about exhaust please read!?
i have a 91 300zx i took my catalyc converter out so i want to know if i did right or wrong i straight piped it so now my mufflers sound like shit because they are cheap and i think they sound like shit because to much air is going threw them so ima take them off...but i want to know if i gained horses or made my car slower or the same please help me i cant tell by driving so i need help!!!!!!!!!!!! pm me for responses plz.....