These UK-made exahust pipes are 1-3/4 inch diameter and fit Triumph pre-unit motorcycles with 1-3/4 inch spigots at the head as found on the 650 models

Stock part numbers are 37-1406 and 37-1407

CAD plated duplicate of original Harley-Davidson studs

Size: 3/8 inside diameter x 1 inch length

Complete stock hardware kit for Harley-Davidson Knuckleheads 1940-1947

Y-Pipe Exhaust Pipe 1941-1957 Factory Rigid Harley-Davidson Models - Bare Steel OEM #65505-41 Petcock Thread_In-Line These UK-made exahust pipes areThis is a Y Pipe Exhaust Pipe for 1941 1957 Factory Rigid Harley Davidson Models. Contains H D OEM part numbers 65505 41. Gasbox exhaust pipe sets are manufactured in Cleveland, Ohio and are manufactured true to the originals. Available in raw steel. These USA made exhausts are the perfect for restoring your vintage Harley Davidson to it's original condition.