Michigan Motorsports LS Main Crank Bearings .010" Undersize SI-Series for Stock or Performance -Fits 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96

Michigan Motorsports Main Bearings .010" Undersized Main Bearings, SI-Series, .010" Undersize, Bi-metal, Silicon Aluminum, Chevy 4.8 5.3 5.7 6.0 6.2 Gen 3/4 Set of 5 Michigan Motorsports SI-Series main bearings are recommended for stock or performance engines using factory crankshafts.

The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts.

SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow.