
Michigan Motorsports 1.590" Stock Exhaust Valve | Fits Rectangle-Port LS Heads - LS3 L99 L76 L77 L92 LY6 L94 L9H L96 | Single Stock Replacement Valve
Michigan Motorsports 1.590" Stock Exhaust Valve | Fits Rectangle-Port LS Heads - LS3 L99 L76 L77 L92 LY6 L94 L9H L96 | Single Stock Replacement Valve
- Direct OE Fit for Rectangle-Port LS Heads – Precisely engineered for LS head casting numbers 821, 823, and 5364—no machine work required.
- Spec-Matched 1.590″ Diameter – Exact factory size for exhaust flow and seat sealing on LS3, L99, L76, L77, L92, LY6, L94, L9H, and L96 engines.
- Single or Complete Set of Eight – Flexibility to replace one valve or refresh your entire exhaust train with a full set, depending on your build needs.
- Cost-Effective Engine Refresh Option – An affordable alternative to premium stainless valves, perfect for budget-conscious rebuilds or maintenance.
- Upgrade Path to Performance Valves – Designed as a stocking solution with a seamless upgrade to high-strength stainless steel valves when performance demands rise.
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Michigan Motorsports 1.590" Stock Exhaust Valve | Fits Rectangle-Port LS Heads - LS3 L99 L76 L77 L92 LY6 L94 L9H L96 | Single Stock Replacement Valve
- Direct OE Fit for Rectangle-Port LS Heads – Precisely engineered for LS head casting numbers 821, 823, and 5364—no machine work required.
- Spec-Matched 1.590″ Diameter – Exact factory size for exhaust flow and seat sealing on LS3, L99, L76, L77, L92, LY6, L94, L9H, and L96 engines.
- Single or Complete Set of Eight – Flexibility to replace one valve or refresh your entire exhaust train with a full set, depending on your build needs.
- Cost-Effective Engine Refresh Option – An affordable alternative to premium stainless valves, perfect for budget-conscious rebuilds or maintenance.
- Upgrade Path to Performance Valves – Designed as a stocking solution with a seamless upgrade to high-strength stainless steel valves when performance demands rise.
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Description
- Direct OE Fit for Rectangle-Port LS Heads – Precisely engineered for LS head casting numbers 821, 823, and 5364—no machine work required.
- Spec-Matched 1.590″ Diameter – Exact factory size for exhaust flow and seat sealing on LS3, L99, L76, L77, L92, LY6, L94, L9H, and L96 engines.
- Single or Complete Set of Eight – Flexibility to replace one valve or refresh your entire exhaust train with a full set, depending on your build needs.
- Cost-Effective Engine Refresh Option – An affordable alternative to premium stainless valves, perfect for budget-conscious rebuilds or maintenance.
- Upgrade Path to Performance Valves – Designed as a stocking solution with a seamless upgrade to high-strength stainless steel valves when performance demands rise.


















