Bore plug seal

This bolt-on big bore Sidewinder kit is as big as possible

like used in high performance automotive manifolds and high-end handgun bodies

The new specifications are not useful in most stock engines

Front (counter shaft): 18-21 Softail

Rear Hydraulic Brake Drum 1958-62 chrome B Bore plug sealReproduction style brake drum. With pre installed sprocket. Replacement for OEM 41400 58C. Note: Suspension travel and even marginal out of round sprockets or brake drums, a common occurrence from day one, create a noticeable tight spot. Adjust your chain on this 'tightest spot'. Always keep sufficient play to prevent excessive wear on chain and bearings of transmission mainshaft, swingarm and wheel. Fits: > 58 62 Big Twin