--- product_id: 50644903 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: "$488.72" currency: USD in_stock: true category: "Michigan Motorsports" url: https://www.desertcart.us/products/50644903-michigan-motorsports-ls1-rocker-arms-with-upgraded-trunnions-fits-1999 store_origin: US region: United States of America --- # Complete set of 16 ready-to-install rocker arms Pre-assembled upgraded trunnions save install time 8620 steel trunnions with caged roller bearings 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:** $488.72 **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your LS valvetrain with precision-engineered power and zero downtime! ## 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?** $488.72 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/50644903-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 - • **Next-Level Durability:** 8620 steel trunnions with caged roller bearings for smoother, longer-lasting performance. - • **Time-Saving Precision:** Professionally pre-assembled trunnions eliminate weak points and speed up installation. - • **All-in-One Valvetrain Upgrade:** Complete set of 16 rocker arms ready to bolt on—no rebuild hassle. - • **Engineered for Cathedral Port LS:** Perfect fit for 1999-2013 4.8L, 5.3L, 5.7L & 6.0L LS engines—no guesswork. - • **Built for Performance & Reliability:** Ideal for rebuilds, swaps, and high-RPM builds demanding rock-solid valvetrain stability. ## Overview Michigan Motorsports LS1 Rocker Arms come as a complete set of 16, designed specifically for 1999-2013 Cathedral Port LS engines and 1999-2006 6.0L LS engines. Featuring premium 8620 steel trunnions with caged roller bearings, these rocker arms are pre-assembled for quick installation, enhanced durability, and reduced friction—making them the ultimate upgrade for performance builds and reliable engine rebuilds. ## Description Buy 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: Rocker Arms - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## 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 | #32,577 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Engine Rocker Arms | | Brand | Michigan Motorsports | | Customer Reviews | 4.7 4.7 out of 5 stars (338) | | Date First Available | August 20, 2015 | | Exterior | Machined | | Is Discontinued By Manufacturer | No | | Item Weight | 8 pounds | | Item model number | 25100 | | Manufacturer | Michigan Motorsports | | Manufacturer Part Number | 25100 | | Model | LS1 Rocker Arm Kit | | Product Dimensions | 8 x 6 x 2 inches | ## 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. ## 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.us/products/50644903-michigan-motorsports-ls1-rocker-arms-with-upgraded-trunnions-fits-1999](https://www.desertcart.us/products/50644903-michigan-motorsports-ls1-rocker-arms-with-upgraded-trunnions-fits-1999) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-23*