Manley Big Block Chevy 2.350in Diameter 0.350in Longer Length Extreme Duty Exhaust Valves - Single

This listing is for a single Manley Extreme Duty exhaust valve designed for Big Block Chevy engines. It measures 2.350 inches in diameter and is 0.350 inches longer than stock, featuring a durable XH-428 material construction. This material is chosen for its exceptional strength at high temperatures, offering significantly better fatigue life compared to many other options on the market. These valves are built to handle the stresses of high-temperature gasoline engines, including valve bounce on the seat, which can dramatically increase stress during operation.

The design includes swirl-polished under-head areas and fully machined combustion faces to help improve airflow into the cylinder and contribute to more efficient combustion. The chrome stems and hard tips add to the overall durability and longevity of the valve, making them a solid choice for demanding applications. Manley's XH-428 material is notable for its high tensile strength at elevated temperatures, outperforming many common exhaust valve materials.