Cast aluminum exhaust fishtail/silencer to Brooklands pattern, often used on sports car or motorcycle. standard hole for pipe 42mm diameter but it can be sleeved down, or bored out to fit 50mm diameter pipe. overall size 445mm x 185mm (main body measures 140mm wide). fishtail measures approx 155mm. cast integral boss for mounting which is undrilled. supplied unpolished only. bare weight approx 2.20kg unpacked.