Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
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Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Build your LS bottom end with confidence using the Michigan Motorsports SI-Series Standard Size LS Main Crank Bearings.
Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds
Item #: 233793485

Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for

Item #: 233793485

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Build your LS bottom end with confidence using the Michigan Motorsports SI-Series Standard Size LS Main Crank Bearings.
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Shop Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series | Fits Gen III/IV 4.8L 5.3L 5.7L 6.0L 6.2L LS Engines | Complete Bearing Set for Stock or Performance Builds online at a best price in Trinidad and Tobago. B099KNX6Z3
  • Complete Standard Size Main Bearing Set: Includes a full set of five standard-size LS main bearings for complete engine installation, making this kit ideal for Gen III and Gen IV LS rebuilds, stock refreshes, and performance bottom-end assembly using factory crankshaft dimensions.
  • Fits Gen III and Gen IV LS Engines: Designed for 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L LS-based V8 engines, including LS1, LS2, LS3, LS6, LQ4, LQ9, L92, L94, L76, L77, LY6, L96, and other common LS car, truck, SUV, and swap applications.
  • SI-Series Performance Design: Engineered for stock and performance LS engines using factory crankshafts, delivering dependable oil control, improved durability, and reliable bearing performance for street builds, rebuilds, and higher-output LS combinations.
  • Bi-Metal Silicon Aluminum Construction: Built with a bi-metal silicon aluminum design that provides excellent load capacity, wear resistance, and long service life while supporting proper bearing function in demanding Gen III and Gen IV LS engine environments.
  • Improved Crankshaft Surface Conformity: Designed to help smooth microscopic surface imperfections on nodular cast iron crankshafts, supporting improved bearing life, reduced wear, lower vibration, and quieter operation during long-term engine use.
Brand NameMichigan Motorsports
Bearing NumberLS 1
Bearing TypeBall Bearing
Set NameStandard Size SI-Series
Part NumberAi261
Unit Count1.0 Count
ManufacturerMichigan Motorsports
Included Components(1) Complete Main Bearing Kit
ModelAi261
Material TypeAluminum,Silicon
Compatible LubricantOil
Specification MetManufacturer's Specifications
BrandMichigan Motorsports
MaterialAluminum,Silicon
Item Weight1 lbs (450 grams)

What's in the box

(1) Complete Main Bearing Kit

Product Description

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Customer Questions & Answers

  • Question: What LS engine sizes do these bearings fit?

    Answer: These bearings are designed for 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L LS engines.
  • Question: Can these bearings be used for performance builds?

    Answer: Yes, they are engineered for both stock and performance LS engine applications.
  • Question: What is the construction material of these bearings?

    Answer: They are made from bi-metal silicon aluminum for excellent durability and load capacity.

Michigan Motorsports Main Bearings Editorial Review

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Features & Benefits

  • Ideal for Gen III and IV LS-based V8 engines.
  • Includes a complete set of five standard-size main bearings.
  • Engineered for stock rebuilds and performance builds.
  • Bi-metal silicon aluminum construction ensures durability and wear resistance.
  • Improves crankshaft surface conformity for longer bearing life.
  • Supports reduced vibration and quieter engine operation.

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