1.550" Od. 0.567" Id. 0.060" Thick Hardened Steel Valve Spring Seat Springs Whether you're rebuilding a stock

Whether you're rebuilding a stock engine or changing to valve springs that have more seat pressure

The throttle body flange accepts up to a 100mm throttle body

These high-flow style air cleaners feature chromed steel construction and a free-flow

They accept all OEM and aftermarket coils and install easily with the included stainless steel button head fasteners

Now you don't have to waste your time searching at swap meets or cleaning and painting less-than-desirable old brackets

1.550" Od. 0.567" Id. 0.060" Thick Hardened Steel Valve Spring Seat Springs Whether you're rebuilding a stockAs with all other parts in the valvetrain, the area where the spring sits takes a beating. The old standard shims simply will not hold up to the extreme pressures and high rpm found in today's performance engines. Speedmaster offers this set of valve spring shims to solve this problem and eliminate failures.