Manley Performance Chevy LS-1/LS-2 Small Block 1.575 Pro Flo Severe Duty Exhaust Valves (Set of 8)

Description

Elevate your high-performance engine with the Manley Performance Chevy LS-1/LS-2 Small Block 1.575 Pro Flo Severe Duty Exhaust Valves. Crafted from XH-428 material, these exhaust valves are engineered to withstand extreme conditions and deliver unmatched durability. Designed for serious racing applications, they feature chrome stems and hard tips that enhance longevity and resistance to wear, ensuring long-term reliability in demanding environments. The swirl-polished under-head areas and fully machined combustion faces optimize airflow and combustion efficiency, contributing to improved engine performance and power output.
The Severe Duty valves have undergone rigorous fatigue testing, demonstrating their exceptional resilience. In typical operation, they endure stresses up to 25,000 lbs, while bouncing on the seat can generate stresses as high as 60,000 lbs. Tested at 40,000 psi and temperatures reaching 1,400°F, these valves have impressively endured up to 100 million cycles, far surpassing competitors’ failure point after 100,000 cycles. This durability translates into fewer replacements and consistent performance over time. The XH-428 material used for exhaust valves offers nearly double the ultimate tensile strength at 1,500°F compared to other widely used materials, making it ideal for high-temperature gasoline engines.
The NK-844 material used for intake valves complements the exhaust valves by providing over four times the ultimate tensile strength at 1,000°F, ensuring balanced strength and durability across your valve train. This set is designed specifically for performance enthusiasts seeking reliable, long-lasting components that can handle the rigors of racing and high-performance applications. Fully compatible with LS-1 and LS-2 small block engines, these valves are a premium choice for maximizing engine efficiency and durability in extreme conditions. Trust Manley’s expertise to provide industry-leading performance components that meet the highest standards of quality and engineering excellence.

Features:

• Material: Exhaust valves made from XH-428 for superior strength and durability

• Material: Intake valves crafted from NK-844 with exceptional tensile strength

• Design: Chrome stems and hard tips for enhanced longevity

• Finish: Swirl-polished under-head areas for improved airflow

• Engine Compatibility: Designed for LS-1 and LS-2 small block engines

• Rigorous Testing: Endured up to 100 million cycles under extreme stress and temperature conditions

• High-Temperature Performance: Rated for operation at 1,400°F with tensile strength nearly double that of competitors

• Optimized Combustion: Fully machined combustion faces for better airflow and efficiency