Manley Chrysler Top Fuel Exhaust Valve Kit - 1.950in Head Dia. 5.020in O/A Length, 0.3715in Stem

Starting with the XH-432 XtremeAlloy material, these Manley Chrysler Top Fuel exhaust valves are built for the most demanding engine environments. This specialized alloy is chosen for its exceptional ability to withstand the extreme heat and forces found in Top Fuel drag racing, high-performance marine engines, and restricted circle track applications. The valves measure 1.950 inches across the head diameter and have an overall length of 5.020 inches, with a 0.3715-inch stem diameter, making them suitable for specific high-output engine builds.

Beyond the advanced material, these valves incorporate several design elements aimed at improving performance and durability. The stems are treated with chrome for improved wear resistance, and the tips are hardened to handle the stress of valve train operation under extreme conditions. You'll also find swirl-polished areas under the head and fully machined combustion faces. This machining helps to improve airflow into the cylinder and can contribute to more efficient combustion, which is critical when pushing an engine to its limits.

If you're building an engine for applications where reliability under intense heat and pressure is paramount, these Manley valves are a solid option. They are designed to last in environments that would quickly destroy lesser components. While these are specialized parts, they represent a well-built solution for racers and high-performance engine builders who need components that can handle the absolute extreme.