Michigan Motorsports Stock Replacement 1.590" Exhaust Valves | Set of 8 | Fits LS3 L99 L76 L77 L92 LY6 L94 L9H L96 Rectangle Port Heads 821 823 5364

Refresh your Gen IV LS engine with this Michigan Motorsports 1.590" Exhaust Valve Set, designed as a direct stock replacement for rectangle port cylinder heads. This set of 8 valves is engineered to match OEM specifications, making it the ideal solution for rebuilding or restoring engines equipped with LS3, L99, L76, L77, L92, LY6, L94, L9H, and L96 platforms. These valves are built for consistent sealing, proper heat dissipation, and long-term durability under daily driving and mild performance conditions. Whether you're performing a top-end refresh, repairing worn components, or maintaining factory performance, this set provides dependable results without the added cost of high-end racing valves. Designed for use with head castings 821, 823, and 5364, these valves offer a true drop-in fit, eliminating the need for modifications. For builders looking to maintain OEM reliability while keeping costs under control, this Michigan Motorsports valve set delivers the perfect balance of performance and value.

• Complete Set of 8 Exhaust Valves: Includes a full set of eight 1.590" exhaust valves, making it ideal for one complete cylinder head or engine refresh, saving time and ensuring consistent performance across all cylinders during rebuilds or repairs.
• OEM-Style Direct Replacement Fitment: Designed to match factory specifications for LS3, L99, L76, L77, L92, LY6, L94, L9H, and L96 engines, ensuring proper fit, sealing, and compatibility with rectangle port cylinder heads without additional machining.
• Optimized for Stock and Mild Performance Builds: Perfect for daily drivers and mild performance applications, these valves provide reliable operation, proper exhaust flow, and consistent combustion sealing without the added cost of high-performance racing components.
• Fits Popular Rectangle Port Head Castings: Compatible with GM cylinder head castings 821, 823, and 5364, making them a go-to solution for common LS rebuilds and repairs across trucks, SUVs, and performance vehicles.
• Durable Construction for Long-Term Reliability: Built to handle heat and stress from normal engine operation, these valves resist wear and maintain structural integrity over time, helping extend engine life and maintain performance.