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  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96
  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96
  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96
  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96
  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96
  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96
  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96
  • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96

    • LS Main Crank Bearings Standard Size SI-Series for Stock or Performance 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96

    Michigan Motorsports

    $49.99
    (1 review) Write a Review
    SKU:
    Ai261
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    Product Description

    Michigan Motorsports LS Main Bearings – SI-Series Standard Size

    Bi-Metal Silicon Aluminum Main Bearing Set for Gen III & Gen IV LS Engines

    Michigan Motorsports SI-Series LS Main Bearings are engineered for stock and performance Gen III and Gen IV LS engine builds using factory crankshafts. Designed with a bi-metal silicon aluminum construction, these standard-size main bearings provide improved oil clearance and enhanced crankshaft surface conformity, helping reduce wear, vibration, and operating noise. The SI-Series is optimized to correct microscopic ferrite peaks commonly found on improperly ground or polished nodular cast iron crankshafts, delivering reliable oil control and long-term durability in street and performance applications.

    Key Features

    • SI-Series Performance Design: Engineered for stock and performance LS engines using factory crankshafts, offering dependable oil control and durability.
    • Bi-Metal Silicon Aluminum Construction: Provides excellent load capacity, wear resistance, and long service life in Gen III and Gen IV LS engines.
    • Improved Oil Clearance: Designed to reduce bearing wear, vibration, and operating noise while maintaining proper oil flow.
    • Enhanced Crankshaft Surface Conformity: Helps smooth microscopic ferrite peaks on nodular cast iron crankshafts for improved bearing life.
    • Complete Engine Set: Includes a full set of five (5) standard-size main bearings for a complete LS engine installation.

    Key Fitments

    • Engine Compatibility: Designed for Gen III and Gen IV LS-based V8 engines.
    • Displacements: 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L LS engines.
    • Bearing Size: Standard size main bearings for factory crankshaft applications.

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    • 5
      LS MAIN CRANK BEARINGS STANDARD SIZE SI-SERIES FOR STOCK OR PERFORMANCE 4.8 5.3 5.7 6.0 6.2 LS1 LS2 LQ4 LQ9 LS3 L92 L94 L76 L77 LY6 L96

      Posted by FRED on Apr 18th 2023

      Excellent Products