![Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] heat-treated to the highest Rockwell](https://cdn.shopify.com/s/files/1/0762/0316/3867/files/PCE325.SBC_412361dc-9b92-4e72-b323-99f89a46ea39.jpg?v=1784401875)
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heat-treated to the highest Rockwell hardness available
Slim line design for when space is at a premium
as well as 1/3 smaller
and you can choose between plain polished
Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] heat-treated to the highest RockwellThese 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.
US$ 8425.00
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