Manley Performance Chevy LT-1 6.2L Severe Duty Exhaust and Intake Valves Set (Part No. 12347-8)

Description

Enhance your engine’s performance with the Manley Performance Chevy LT-1 6.2L Severe Duty Valves Set. Designed for high-temperature gasoline engines, these valves are crafted from premium materials to ensure durability and maximum efficiency. The set includes eight valves, featuring exhaust valves made from XH-428 material and intake valves from NK-844 material, both engineered to withstand extreme conditions. The exhaust valves have undergone rigorous fatigue testing, enduring up to 100 million cycles at 40,000 psi and 1400°F, demonstrating a fatigue life that outperforms competitors by a factor of 1000. These valves are specifically engineered for superior performance in demanding racing and high-performance applications. The chrome stems and hardened tips provide added durability, while the swirl-polished under-head areas and fully machined combustion faces optimize airflow and combustion efficiency, promoting better engine response and power output. The exhaust valves’ XH-428 material offers nearly double the tensile strength at 1500°F compared to other materials, ensuring longevity and resistance to high-temperature stress. Similarly, the NK-844 intake valves exhibit over four times the ultimate tensile strength at 1000°F, making them ideal for high-performance engines. This set is built to meet the rigorous demands of racing and high-performance street applications, providing reliable, long-lasting valve operation under extreme operating conditions. Engineered by Manley Performance, these valves are a critical upgrade for enthusiasts seeking to maximize engine longevity, power, and efficiency.

Features:

• Proven fatigue resistance with up to 100 million cycles at high stress levels

• Constructed from XH-428 (exhaust) and NK-844 (intake) materials for exceptional strength

• Designed for high-temperature gasoline engines withstanding extreme thermal conditions

• Chrome stems and hardened tips for enhanced durability and wear resistance

• Swirl-polished under-head areas and fully machined combustion faces for improved airflow and combustion efficiency