This 4 piece exhaust clamp set is a reproduction of the originals and fits 1947 - 1957 Harley-Davidson Panhead motorcycles. The perfect replacement for H-D OEM part number 47-57 CL HDW. Exhaust clamps are available Parkerized with hardware. The Gasbox exhaust clamps are made here in the USA and true to the originals found on vintage Harley-Davidsons. These USA-made exhaust clamps are perfect for restoring your vintage Harley-Davidson to it's original condition.