Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] Designed for engines producing up

Designed for engines producing up to 500hp

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

from performance street to competition use

Speedmaster aluminum pulleys are made from a 356 aluminum alloy that is heat-treated to T-6 specs

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

Chevy GM LS 010 Main Bearings [4.8 5.3 5.7 6.0 6.2] Designed for engines producing upThese 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.