Exhaust ValveExtend the life of the valve train and intake components by as much as 4x over the OEM titanium partsStainless steel conversion kits include only what’s needed to convert your head to the long-life stainless steel Black Diamond intake valvesValves are designed to not only offer the best lifespan over OEM, but also designed to flow and perform better than OEM componentsKits include forged one-piece stainless steel intake valves, wound chrome-silicon heat-treated wire valve springs, ultra-light titanium retainers and hardened steel bases Components are created using Finite Element Analysis (F.E.A.) software, as well as proprietary camshaft analysis and spring design software to ensure consistent performance and accurate designsSpecifically designed and engineered for each applicationMade in the U.S.A.