Overall Length (Muffler and Downpipe Connected): 630 mm / 24.8 inches Length of Downpipe: 325 mm / 12.8 inches Muffler / Silencer Can Length: 320 mm / 12.6 inches Diameter of Downpipe: 22.40 mm / 0.88 inches Diameter of Muffler: 101.03 mm / 3.98 inches Bor