For over 40 years, Manley Performance has been manufacturing the finest stainless steel valves.
Since their inception, Manley valves have been the standard of the industry, a fact that remains true today as new markets are entered.
Manley Performance stainless steel valves for Chevy LS, Ford Modular, and Chrysler SB HEMI utilize exceptional Race Series alloy and are manufactured to the highest quality standards.
Designed to outflow and outperform all others in severe environments, Manley stainless valves feature durable chrome stems, swirl polished underheads, fully hardened tips, completely machined combustion faces, closely controlled margin heights, and exact stem to seat concentricity to render an unsurpassed finished product.
Typically, Manley intake valves are built with the original Pro-Flo design, which reduces the stem diameter in the fillet area for increased airflow and less valve weight.
This concept is executed on Chevy LS and Chrysler HEMI parts.
In specific applications, Manley offers Extreme Duty exhaust material.
The Extremealloy alloy offers more hot hardness and high-temperature strength than competitors' offerings, ideal for extremely high boosted applications where exhaust gas temperatures reach unthinkable levels.
For the Ford Modular 4.6L and 5.4L 3 valve cylinder head engine, Extremealloy was chosen.
Manley stainless valves are suitable for applications ranging from mild street performers to 1000+ horsepower race cars competing at the drag strip.
Manley has been at the forefront of niche markets, developing better flowing and stronger aftermarket valves for the Chevy LS and Ford Modular market before the competition.
The first to offer L-92 valves, Manley's hollow LS valves are the very best in the industry.
