--- product_id: 439291451 title: "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" brand: "michigan motorsports" price: "19479 som" currency: KGS in_stock: true category: "Michigan Motorsports" url: https://www.desertcart.kg/products/439291451-michigan-motorsports-ls-main-crank-bearings-standard-size-si-series store_origin: KG region: Kyrgyzstan --- # Bi-metal silicon aluminum build Fits Gen III/IV LS engines 5-piece complete bearing set 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 **Brand:** michigan motorsports **Price:** 19479 som **Availability:** ✅ In Stock ## Summary > ⚡ Power your LS build with precision and durability — don’t settle for less! ## Quick Answers - **What is this?** 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 by michigan motorsports - **How much does it cost?** 19479 som with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/439291451-michigan-motorsports-ls-main-crank-bearings-standard-size-si-series) ## 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 - • **Smooth Operator:** Improved crankshaft surface conformity reduces vibration and noise for a quieter ride. - • **Street-Ready Reliability:** Designed for both stock refreshes and high-output LS builds with dependable oil control. - • **Complete Engine Confidence:** Full set of five standard-size main bearings for seamless LS rebuilds and performance builds. - • **Durability Meets Performance:** Bi-metal silicon aluminum construction ensures superior load capacity and wear resistance. - • **Precision Fit for LS Powerhouses:** Engineered to fit 4.8L to 6.2L Gen III/IV LS engines including LS1, LS3, LQ4, and more. ## Overview Michigan Motorsports LS Main Crank Bearings SI-Series offer a complete set of five standard-size bearings designed for Gen III and IV LS engines from 4.8L to 6.2L. Crafted with bi-metal silicon aluminum for enhanced durability and wear resistance, these bearings improve crankshaft conformity, reduce vibration, and ensure reliable oil control—perfect for stock rebuilds and performance upgrades alike. ## 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. ## 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 | #79,216 in Automotive ( See Top 100 in Automotive ) #2 in Automotive Replacement Engine Main Bearings | | Brand Name | Michigan Motorsports | | Compatible Lubricant | Oil | | Customer Reviews | 4.7 4.7 out of 5 stars (118) | | Included Components | (1) Complete Main Bearing Kit | | Manufacturer | Michigan Motorsports | | Material Type | Aluminum,Silicon | | Model | Ai261 | | Number of Items | 1 | | Part Number | Ai261 | | Set Name | Standard Size SI-Series | | Specification Met | Manufacturer's Specifications | | Unit Count | 1 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 ![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 - Image 1](https://m.media-amazon.com/images/I/71cbXljII6L.jpg) ![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 - Image 2](https://m.media-amazon.com/images/I/61ySgcK7XuL.jpg) ![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 - Image 3](https://m.media-amazon.com/images/I/61ynOiRyjIL.jpg) ![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 - Image 4](https://m.media-amazon.com/images/I/61VC+If1sML.jpg) ![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 - Image 5](https://m.media-amazon.com/images/I/61dIToruU9L.jpg) ## Available Options This product comes in different **Size** options. --- ## 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.kg/products/439291451-michigan-motorsports-ls-main-crank-bearings-standard-size-si-series](https://www.desertcart.kg/products/439291451-michigan-motorsports-ls-main-crank-bearings-standard-size-si-series) --- *Product available on Desertcart Kyrgyzstan* *Store origin: KG* *Last updated: 2026-08-21*