Chevy GM LS STD Main Bearings [4.8 5.3 5.7 6.0 6.2] Featuring a boltin EFI downdraft

Featuring a boltin EFI downdraft injection system and complete serpentine drive kit

making them ideal for withstanding the rigors of any demanding environment

Our Speedmaster replacement electric water pump motors are manufactured to maintain high flow rates and the high quality you expect from PCE

Their dual-idler design has CNC-machined components and they are easy to install

and road conditions

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.