--- product_id: 439291451 title: "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" brand: "michigan motorsports" price: "R2246" currency: ZAR in_stock: true reviews_count: 11 category: "Michigan Motorsports" url: https://www.desertcart.co.za/products/439291451-ls-main-crank-bearings-standard-size-si-series-fits-gen store_origin: ZA region: South Africa --- # Bi-metal silicon aluminum build Fits Gen III/IV LS engines 5-piece complete bearing set 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 **Brand:** michigan motorsports **Price:** R2246 **Availability:** ✅ In Stock ## Summary > ⚡ Power your LS build with precision and durability — don’t settle for less! ## Quick Answers - **What is this?** 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 by michigan motorsports - **How much does it cost?** R2246 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/439291451-ls-main-crank-bearings-standard-size-si-series-fits-gen) ## Best For - michigan motorsports enthusiasts ## Why This Product - Trusted michigan motorsports brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Complete Engine-Ready Kit:** Five standard-size main bearings for seamless LS rebuilds and performance builds. - • **Durable Bi-Metal Construction:** Silicon aluminum design ensures superior load capacity and wear resistance under high stress. - • **Precision Fit for Gen III/IV LS:** Engineered to perfectly match 4.8L to 6.2L LS engines including LS1 through L96 variants. - • **Enhanced Crankshaft Compatibility:** Smooths microscopic crankshaft imperfections to reduce wear, vibration, and noise. - • **Optimized Oil Control & Longevity:** SI-Series design delivers dependable oil flow and long-term bearing durability for street and performance use. ## Overview Michigan Motorsports LS Main Crank Bearings Standard Size SI-Series is a complete set of five bi-metal silicon aluminum bearings designed for Gen III and IV LS engines (4.8L to 6.2L). Engineered for both stock and performance builds, these bearings improve crankshaft surface conformity, reduce wear and vibration, and ensure reliable oil control for long-lasting engine performance. ## Description Build your LS bottom end with confidence using the Michigan Motorsports SI-Series Standard Size LS Main Crank Bearings. Designed for Gen III and Gen IV LS-based V8 engines, this complete main bearing set is built for factory crankshaft applications in both stock rebuilds and performance engine builds. The SI-Series uses bi-metal silicon aluminum construction to provide dependable load capacity, wear resistance, oil control, and long-term durability. These standard-size main bearings are designed for 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L LS engines, including popular LS1, LS2, LS3, LS6, LQ4, LQ9, L92, L94, L76, L77, LY6, and L96 applications. Michigan Motorsports lists this as a full set of five standard-size main bearings for complete LS engine installation. Ideal for engine refreshes, rebuilds, LS swaps, and performance bottom-end work, these bearings are engineered to improve crankshaft surface conformity, reduce wear, support proper oil clearance, and help minimize vibration and operating noise in factory crankshaft LS applications. Review: Good product - No issues. They are exactly what they should be. They went in, tolerance was good. I don't see an issue. Review: Great company - Perfect fit and great company ## Features - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B099KNX6Z3 | | Bearing Number | LS 1 | | Bearing Type | Ball Bearing | | Best Sellers Rank | #45,700 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Engine Main Bearings | | Brand | Michigan Motorsports | | Brand Name | Michigan Motorsports | | Compatible Lubricant | Oil | | Customer Reviews | 4.7 out of 5 stars 113 Reviews | | Included Components | (1) Complete Main Bearing Kit | | Manufacturer | Michigan Motorsports | | Material | Aluminum , Silicon | | Material Type | Aluminum,Silicon | | Model | Ai261 | | Part Number | Ai261 | | Set Name | Standard Size SI-Series | | Specification Met | Manufacturer's Specifications | | Unit Count | 1.0 Count | | Warranty Description | 30 days | ## Product Details - **Bearing Number:** LS 1 - **Bearing Type:** Ball Bearing - **Brand:** Michigan Motorsports - **Material:** Aluminum,Silicon - **Specification Met:** Manufacturer's Specifications ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/71cbXljII6L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product *by T***N on June 5, 2026* No issues. They are exactly what they should be. They went in, tolerance was good. I don't see an issue. ### ⭐⭐⭐⭐⭐ Great company *by N***A on May 10, 2026* Perfect fit and great company ### ⭐⭐⭐⭐⭐ Good product *by C***M on December 5, 2025* Fast shipping --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/439291451-ls-main-crank-bearings-standard-size-si-series-fits-gen](https://www.desertcart.co.za/products/439291451-ls-main-crank-bearings-standard-size-si-series-fits-gen) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-12*