Hey everyone.. im pretty new to this but im trying to learn and learn fast. This guy told me about a part that would have a switch inside the car that could bypass the cat converter.. does anyone know what that is? or what it is called?.. secondly im planning on getting some cat back exauhst soon.. and on like summit racing it specifies some exauhst for only the 6 cylinder firebird (which i have) but the selection is pretty small.. so is putting exauhst that is i guess "made" for an 8 cylinder going to work? or whats the deal with that? thanks a lot -Matt