These are ideally sized for 1-3/4" exhaust pipes

Chrome plated custom shoulder bolts and locknuts fit 1952-68 FL

1951-64 W/Footshft

Some combinations of triple trees

8mm/3 inch Primary Open Belt Drive - Kick Start - Spline Shaft - 1955-1984 Harley-Davidson Big Twin Inside Diameter_.313" These are ideally sized forLooking for that classic open belt drive look with rock solid performance for your vintage Big Twin? This 8mm, 3 inch open belt drive from BDL is widely regarded as the best combination for all around riding and dependability. Proven Dependability: The 8mm, 3 inch belt drive is a time tested setup known by riders for its reliability and performance in all around riding conditions. Specific Vintage Fitment: Designed specifically for 1955 1984 Harley