Manley Chevy LT-1 6.2L 1.590in Head Diameter Pro Flo/Severe Duty Exhaust Valves (Set of 8)

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 Valve - Exhaust, Valve-S/D LT1 6.2L 1.590, .3136 STEM.

• 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

Upgrade your engine with the Manley Performance Chevy LT-1 6.2L 1.590-inch head diameter Pro Flo and Severe Duty exhaust valves, designed for high-performance automotive applications. Crafted with advanced materials, these valves are engineered to withstand extreme temperatures and demanding conditions. The exhaust valves are made from exclusive XH-428 alloy, offering exceptional tensile strength and fatigue resistance, ensuring long-lasting durability under high-stress engine environments. Each valve features swirl-polished underheads and fully machined combustion faces, optimizing airflow and improving overall engine efficiency. Chrome stems and hardened tips further enhance durability, resisting wear and corrosion to maintain peak performance over time. These valves are specifically built for racers and enthusiasts seeking reliable, race-winning components that deliver consistent power gains and engine longevity. The proven fatigue strength of these valves allows them to endure over 100 million cycles at 40,000 psi and 1400°F, significantly outperforming standard alternatives, which typically fail after only 100,000 cycles. Installation of these valves can help improve airflow, combustion efficiency, and engine responsiveness, making them an ideal choice for high-performance rebuilds or upgrades. Suitable for demanding automotive applications, these valves are designed to meet the rigorous standards of professional racing and serious street performance projects. With a set of eight valves, they provide a comprehensive solution for restoring or enhancing your engine's performance capabilities.

Features:

• Swirl polishing and machined faces improve airflow and optimize engine efficiency

• Constructed from exotic alloys like XH-428 for superior tensile strength and longevity

• Proven fatigue strength supports extreme performance with over 100 million cycles endurance

• Chrome stems and hard tips increase durability and resistance to wear and corrosion