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Manley Exhaust Valves Discover the extraordinary capabilities of Manley Performance Products' Extreme Duty Series Valves. Engineered to cater to the demanding needs of Top Fuel and Funny Car drag racers, Big Block Chevy marine enthusiasts, and Small Block Chevy restricted carburetor circle track competitors, these valves are your ticket to unparalleled performance. These are ideal for specialized applications and tailored for any application where extreme force and heat resistance is a must. XH-432 Xtreme Alloy is the hallmark of excellence in exhaust valve material construction. Featuring chrome stems and hard tips for exceptional longevity and wear restistance. The swirl polished under head areas are fully machined combustion faces to improve airflow and combustion efficiency.
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