Manley Severe Duty® Valves deliver the ultimate in strength, reliability, and high-performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH-428 for exhaust and NK-844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400°F, Manley exhaust valves endured 100 million cycles, while competitors failed after just 100,000, proving a 1,000× longer fatigue life. Each valve features chrome stems, hard tips, and swirl-polished underheads with fully machined combustion faces for superior airflow, efficiency, and wear resistance. Built for those who demand race-winning strength and precision, Manley Severe Duty® Valves set the industry standard for performance and endurance.
Manley Chrysler 340intake Valve Kit - 2.020in Head Dia. 5.050in O/A Length, 0.3720in Stem
Severe Dty. Chrysler 340 Int. Vlv Kt-2.020 in. Dia.,5.050 in. O/A ,.3720 in. Stm
Swirl polishing and machined faces improved airflow/optimized efficiency
Exotic alloys for superior tensile strength, reliability, and longevity
Proven fatigue strength for extreme performance
Chrome stems and hard tips enhance durability
Manley Valve - Intake, Valve-340-360 2.020.
Manley Valve - Intake, Valve-340-360 2.020
Engine Intake Valve
Valve-340-360 2.020
Valve - Intake
