Black Diamond Exhaust Valve

KPMI Black Diamond Exhaust Valve High-performance stainless steel exhaust valve engineered for durability, low friction and superior flow. The KPMI Black Diamond® Exhaust Valve uses an advanced German impregnation process to deliver longer life and dependable performance under extreme conditions. Advanced surface treatment: Impregnated to a depth of 0.002" with a surface buildup of 0.0002" for superior wear and corrosion resistance versus chrome or nickel plating. Reduced friction & improved durability: The Black Diamond® finish lowers friction and improves wear properties for consistent valve operation and longer service intervals. Optimized flow design: One-piece forging with precision profiles to enhance exhaust flow and engine efficiency. Lightweight, high-strength construction: Forged stainless steel resists cracking and fatigue in high-temperature exhaust environments. Ideal for performance engines, race applications and high-mileage restorations, the KPMI Black Diamond Exhaust Valve combines advanced metallurgy and precision manufacturing to protect your engine and improve exhaust flow. Trust KPMI for reliable valves that outperform traditional plated options.