Manley 11212-8 - Valve - Int., S/D, 39.0mm / 1.535 in. Max Head Diameter

Manley 11212-8 - Valve - Int., S/D, 39.0mm / 1.535 in. Max Head Diameter

Manley Valve - Int., S/D, 39.0mm / 1.535 in. Max Head Diameter

Max Head Diameter: 39.0mm / 1.535in. - Use Custom Order Form or call to order

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.

• Hard Tips and Hardened Grooves
• No Need for Inserted Tips or Wear Caps
• Tight Tolerance Delivery: Strict quality control measures enable the delivery of valves within tight tolerances, meeting the highest precision standards.
• Manley Performance can custom build vavles for any possible combination with a short lead time. Please call your sales representative.