Manley Performance has been manufacturing the finest stainless steel valves for over 40 years. They have been the standard of the industry since their inception; a fact that still remains true today as theyve entered into new markets. Manley Performance Chevy LS stainless steel valves utilize their exceptional "Race Series" alloy and are manufactured to the highest quality standards.
Manley valves are designed to out flow and out perform all others even in the most severe environments. Featuring gorgeous yet durable chrome stems, swirl polished under heads, fully hardened tips, completely machined combustion faces, closely controlled margin heights, and exact stem to seat concentricity to render a finished product that is unsurpassed.
In certain specific applications, Manley offers an "Extreme Duty" exhaust material. Their "Extremealloy" alloy offers more hot hardness and high temperature strength than competitors offerings. This alloy is ideal for extremely high boosted applications where the exhaust gas temperatures reach what seem like unthinkable levels.
Manley stainless valves are suitable for all applications ranging from the mild street performer to the jaw dropping 1000+ horsepower race cars competing at the drag strip.
Note: We strongly recommends that customers check their valve guide size in order to achieve the proper valve stem to guide clearance. Guides may need to be honed when replacing stock factory valves.
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