![Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] to increase flow for more](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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to increase flow for more performance
as well as 1/3 smaller
Slim line design for when space is at a premium
don't cut corners
Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] to increase flow for moreThese 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.
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