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 SR 20 Brodix Severe Duty Series Stainless Steel Exhaust Valves 2.400in Dia 6.030 L - Set of 8
Severe Dty. BBC Int. Vlv Kit - 2.400 in. Head Dia.,6.030 in. O/A ,.3415 in. Stem
Swirl polishing and machined faces improved airflow/optimized efficiency
Exotic alloys for superior tensile strength, reliability, and longevity
Manley Valve - Intake, Valve-S/D BRODIX SR20? 2.400, 6.030 .
Manley Valve - Intake, Valve-S/D BRODIX SR20? 2.400, 6.030
Proven fatigue strength for extreme performance
Chrome stems and hard tips enhance durability
Valve-S/D BRODIX SR20? 2.400, 6.030
Engine Intake Valve
Valve - Intake
