Over-and-under pipes with turn-out ends Full-coverage heat shields 1-3/4" headpipe steps to 1-7/8"; stepped headpipes improve exhaust flow for more power Heavy-duty 16-gauge steel construction for long life DCB-designed baffle manages flow to improve low-end torque Include all mounting hardware Made in the U.S.A.. EXHAUST P-ST T/O M109R CH