Ford SB 289 302 351 Windsor Cast 0.500" Shaft Distributor Gear [Thunder] which is much stronger than

which is much stronger than stock steel and mates better with an aluminum case

heat-treated for maximum strength

These Speedmaster 8-71 and 6-71 supercharger manifolds are aluminum constructed and suitable for competition or street use

Constructed from a composite material with a steel core

This is our most popular manifold and is showing up on many performance street machines and street rods

Ford SB 289 302 351 Windsor Cast 0.500" Shaft Distributor Gear [Thunder] which is much stronger thanMatch your camshaft with Speedmaster iron distributor gears. These small gears have a big impact on your engine's performance. Best suited for hydraulic or solid flat tappet camshafts, our iron distributor gears are the perfect mates for your cast iron cams. The right choice is critical for your engine and your wallet choose Speedmaster iron distributor gears. They are manufactured from top quality cast iron, and then nitrided for durability.