![Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] They include a drain plug](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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They include a drain plug for clean and easy fluid changes
Speedmaster serpentine belts are designed to keep your accessory drive operating properly
Available in different bore diameters to suit your specific engine's needs
The outer cases made from 8620 Chrome-Nickel-Moly steel and the case hardened for long life and improved strength
Speedmaster EFI intake manifolds make it simple to convert competition engines to electronic fuel injection
Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] They include a drain plugThese 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.
