Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] with the performance and durability

with the performance and durability required to reach the winner's circle

These Speedmaster supercharger manifolds are aluminum constructed and suitable for competition or street use

Cover your valvetrain with a set of Speedmaster cast aluminum valve covers

Our rear-ends have a reputation for being tough to handle the abuse of Circle Track

stable air flow at any rpm

Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] with the performance and durabilityThese Speedmaster main bearings are just what you need to freshen up your engine. Why? They use silicon aluminum bi metal construction. Silicon aluminum is the choice for many of today's engine manufacturers because of its high fatigue strength and superior temperature threshold. Bearing wear is dramatically reduced and the fatigue strength is greatly improved.