HELP - Exhaust note
EL XR6 motor with big cam, have added an off the shelf Coby exhaust system, Headers with 2.5inch and 2 mufflers. This soundz OK on start up but when under load and reving hard it soundz like crap. Real farty. The guy who did it says it the cam? I`m going to have to go to a expert and see what he can come up with... hoping someone else may have experienced this when changing cams????? any fixes come to mind ???