![Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] Featuring a boltin EFI downdraft](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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Featuring a boltin EFI downdraft injection system and complete serpentine drive kit
circuit racing and made to withstand extreme use
making them ideal for withstanding the rigors of any demanding environment
Speedmaster pushrods are available in both 5/16 in
Our Speedmaster replacement electric water pump motors are manufactured to maintain high flow rates and the high quality you expect from PCE
Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] Featuring a boltin EFI downdraftThese 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.
