what would my engine exhaust sound like if i made a custom muffler that was just smooth on the inside, would it have an echoing sound? the headers and the pipes would be smooth too (after market) on a nissan 350z would that make it rumble instead of the trumpet/trumbone sound?

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information