Manley Ford 351 Cleveland Exhaust Valve Kit - 1.655in Head Dia. 5.067in O/A Length, 0.3415in Stem

These Manley Severe Duty? exhaust valves are made from XH-428 material, which offers nearly double the ultimate tensile strength at 1500?F compared to other common exhaust valve materials. They measure 1.655 inches across the head and have an overall length of 5.067 inches, with a 0.3415-inch stem diameter, specifically for Ford 351 Cleveland engines.

Manley subjected these valves to rigorous fatigue testing, simulating normal operation and extreme conditions where valves might bounce on the seat. Tested at 40,000 psi and 1400?F, these valves impressively endured up to 100 million cycles, a notable improvement over competitor valves that failed much sooner. The design includes swirl-polished under-head areas and fully machined combustion faces to help improve airflow and combustion efficiency. They also feature chrome stems and hard tips for added durability and longevity in high-temperature gasoline engines.

If you're rebuilding the top end of your Ford 351 Cleveland and need exhaust valves that can handle demanding conditions, these Manley Severe Duty? valves are a solid option. They are designed for high-temperature gasoline engines and are built to last.