Manley VALVE-S/D 1.600 .700 EA

The Manley Performance 11387-1 is an exhaust valve designed for high-temperature gasoline engines. Crafted from XH-428 material, it offers superior tensile strength and durability. The valve features a chrome stem and hard tip for enhanced longevity and improved airflow.

These Severe Duty valves have undergone rigorous fatigue testing, enduring up to 100 million cycles under normal operation and significantly more under bouncing conditions, outperforming competitors by a substantial margin. They are optimized for improved airflow and combustion efficiency with swirl-polished under-head areas and fully machined combustion faces.