Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] Slim line design for when

Slim line design for when space is at a premium

The pump is submerged in fuel

Speedmaster manufactures these master cylinders from quality materials to ensure proper fitment

heat-treated to the highest Rockwell hardness available

as well as 1/3 smaller

Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] Slim line design for whenThese 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.