--- product_id: 511980172 title: "Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Fits 1999-2013 4.8L 5.3L 5.7L Cathedral Port LS & 1999-2006 6.0L LS Engines | Complete Set of 16 Ready-to-Install Rockers" brand: "michigan motorsports" price: "388824CFA" currency: XOF in_stock: true reviews_count: 5 url: https://www.desertcart.sn/products/511980172-michigan-motorsports-ls1-rocker-arms-with-upgraded-trunnions-fits-1999 store_origin: SN region: Senegal --- # 8620 steel trunnions with caged roller bearings Pre-assembled for faster install & enhanced durability Complete set of 16 ready-to-install rocker arms Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Fits 1999-2013 4.8L 5.3L 5.7L Cathedral Port LS & 1999-2006 6.0L LS Engines | Complete Set of 16 Ready-to-Install Rockers **Brand:** michigan motorsports **Price:** 388824CFA **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your LS valvetrain game—install strength, speed, and reliability in one sleek package! ## Quick Answers - **What is this?** Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Fits 1999-2013 4.8L 5.3L 5.7L Cathedral Port LS & 1999-2006 6.0L LS Engines | Complete Set of 16 Ready-to-Install Rockers by michigan motorsports - **How much does it cost?** 388824CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/511980172-michigan-motorsports-ls1-rocker-arms-with-upgraded-trunnions-fits-1999) ## 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 - • **Wide Compatibility:** Fits 1999-2013 4.8L, 5.3L, 5.7L cathedral port LS & 1999-2006 6.0L LS engines—perfect for your LS swap or rebuild. - • **Unmatched Durability:** 8620 steel alloy trunnions paired with caged roller bearings for rock-solid strength and smooth operation. - • **Plug-and-Play Convenience:** Pre-assembled and tested, saving you hours on installation and eliminating common factory weak points. - • **All-in-One Valvetrain Upgrade:** Complete set of 16 rocker arms with upgraded trunnions—no rebuild hassle, just bolt and go. - • **Performance-Ready Reliability:** Engineered to handle higher RPMs and aggressive cam profiles, ideal for street, strip, and high-performance builds. ## Overview Michigan Motorsports LS1 Rocker Arms come as a complete set of 16 pre-assembled rocker arms with upgraded 8620 steel trunnions and caged roller bearings. Designed for 1999-2013 cathedral port LS engines and 1999-2006 6.0L LS engines, these rocker arms improve valvetrain durability, reduce friction, and support higher RPM applications. Perfect for rebuilds, performance upgrades, and LS swaps, they deliver OEM precision fit and enhanced reliability straight out of the box. ## Description Upgrade your GM LS engine’s valvetrain with these pre-assembled Michigan Motorsports LS1 Rocker Arms featuring upgraded trunnions, designed to enhance stability, durability, and performance. This kit provides fully assembled rocker arms with high-performance trunnion bearings, replacing the factory needle bearings for improved strength and reliability. Designed as a direct replacement for LS-based engines, these rocker arms fit 4.8L, 5.3L, 5.7L, 6.0L LS1, LS2, LS6, LQ4, LQ9, LY5, LM7, and L33 applications, making them an ideal upgrade for stock and high-performance builds. The upgraded trunnions enhance valvetrain stability and allow for increased RPM potential, ensuring smoother operation under high-lift camshaft conditions. Built for long-term durability, these rocker arms are precision-machined to OEM specifications, ensuring a perfect fit and reliable performance in LS-powered vehicles. Whether you're rebuilding an engine, upgrading your valvetrain, or replacing worn factory components, these pre-assembled LS1 rocker arms with upgraded trunnions offer a superior solution for strength and longevity. Upgrade your LS valvetrain with a proven high-performance rocker arm solution designed for street, strip, and high-performance applications. ## Features - Complete Set of 16 Rocker Arms: Includes 16 LS series rocker arms with upgraded roller bearing trunnions already installed, giving builders a complete ready-to-install valvetrain upgrade for one LS V8 engine without needing to press apart and rebuild the rockers separately. - Upgraded Trunnions Already Installed: Professionally assembled with premium trunnion bearing upgrades before shipment, saving install time while improving durability, reducing friction, and eliminating one of the most common weak points in factory-style LS rocker arm assemblies. - 8620 Steel Trunnion with Caged Roller Bearings: Built with an 8620 steel alloy trunnion and caged roller bearings for improved strength, smoother rocker arm movement, and better valvetrain stability compared to worn or failure-prone factory needle bearing assemblies. - Fits Cathedral Port LS Applications: Designed for 1999-2013 4.8L, 5.3L, and 5.7L cathedral port LS engines and 1999-2006 6.0L LS engines, including LS1, LS2, LS6, LR4, LM7, L59, LQ4, LQ9, LM4, L33, LY5, LMG, LH6, LC9, and related platforms. - Ideal for Rebuilds and Performance Builds: A strong upgrade for stock refreshes, heads-and-cam builds, LS swaps, truck builds, and higher-RPM applications where improved rocker arm reliability, better bearing retention, and ready-to-install convenience matter. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B01JDIQRQK | | Best Sellers Rank | #104,631 in Automotive (See Top 100 in Automotive) #8 in Car Engine Rocker Arms | | Brand | Michigan Motorsports | | Customer Reviews | 4.7 4.7 out of 5 stars (348) 4.7 out of 5 stars | | Date First Available | 12 July 2020 | | Exterior | Machined | | Item Model Number | 25100 | | Item Weight | 3.63 Kilograms | | Manufacturer | Michigan Motorsports | | Manufacturer Part Number | 25100 | | Model | LS1 Rocker Arm Kit | | Oem Part Number | LS1 Rocker Arms | | Product Dimensions | 20.32 x 15.24 x 5.08 cm; 3.63 kg | ## Images ![Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Fits 1999-2013 4.8L 5.3L 5.7L Cathedral Port LS & 1999-2006 6.0L LS Engines | Complete Set of 16 Ready-to-Install Rockers - Image 1](https://m.media-amazon.com/images/I/81cg-k8QuaL.jpg) ## Questions & Answers **Q: Are these rocker arms compatible with an LS1 cam swap?** A: YES! Michigan Motorsports LS1 Rocker Arms are specifically designed to handle aggressive camshaft profiles and high-performance cam swaps. **Q: What engines are these rocker arms compatible with?** A: These rocker arms are compatible with LS1, LS6, and other GM LS-based engines. Will not fit Rectangle Port/"LS3" Style Heads **Q: Do these rocker arms come with a trunnion upgrade?** A: Absolutely! These rocker arms feature upgraded trunnions with heavy-duty captured needle bearings for improved performance and durability. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent replacement part *by on Reviewed in Canada 14 August 2019* Perfect replacement part and seemed to be built better then oem, very happy ### ⭐⭐⭐⭐⭐ For a 2012 Silverado 4.8 *by on Reviewed in the United States 18 July 2026* So far so good went with a btr truck Norris cam and caddy lifters. Btr rods and springs. For a 2012 Silverado. Haven’t tuned it yet and the check engine light went away. Truck loves it. ### ⭐⭐⭐⭐⭐ Fit perfect *by on Reviewed in Canada 20 May 2019* Good quality ## Frequently Bought Together - Michigan Motorsports LS1 Rocker Arms with Upgraded Trunnions | Pre-Assembled for GM LS Engines | Fits 4.8 5.3 5.7 6.0 LS2 LS6 LQ4 LQ9 LY5 LM7 L33 | Enhanced Durability and Performance - Michigan Motorsports Camshaft Thrust Retainer Plate LS Includes ARP Bolt Kit 134-1002 Gen III IV 4.8 5.3L 6.0L 6.2L LS LS1 LQ4 LQ9 LS2 LS3 Fits 12589016 Non-VVT --- ## 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.sn/products/511980172-michigan-motorsports-ls1-rocker-arms-with-upgraded-trunnions-fits-1999](https://www.desertcart.sn/products/511980172-michigan-motorsports-ls1-rocker-arms-with-upgraded-trunnions-fits-1999) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-10-07*