Manley 11671-8 Race Master Exhaust Valve, Set of 8

Head Diameter: 1.625", Stem Diameter: 0.3125", Tip Length: 4.925", Bottom Angle/Radius: 9.8" x 0.5", Seat Width: 0.3", Top Height head: 20 units installed Weight of TBAMANLEY performance has been manufacturing the finest stainless steel valves for over 40 years Manley valves have been at the forefront of the industry since their inception a fact that remains true today when we enter new markets. Manley Performance Chevy LS, Ford Modular, and Chrysler SB HEMI Stainless Steel Valve utilize our exceptional Race Series alloy and are manufactured to the highest quality standards. Manley valves are designed for flow and the performance of all others in the most severe environments.Manley stainless steel valve with gorgeous yet durable chrome stems, polished sweats, fully hardened tips, fully machined combustion faces, closely controlled margin heights, and exact stem to seal concentricity to produce a finished product that is not surpassed. Manley intake valves are typically constructed with our original Pro-Flo design which reduces the stem diameter in the airless flow zone. This concept is executed on our Chevy LS and ChryslerHEMI parts. In some specific applications, Manley offers our ExtremeDuth exhaust material. Our Extremealloy alloy offers more temperature resistance than our competitors. This alloy is ideal for extremely high applications where exhaust gas temperatures reach levels that seem unthinkable. In the case of the Ford Modular 4.6L and 5.4L valve cylinder head engine, we have chosen to use: Extremealloy. Manley stainless steel valves are suitable for all applications, from smooth street performance to drop Jaw-dropping 1000+ horse racing cars competing in the drag strip. Manley has been at the forefront with these better flowing and stronger post-competition markets. We were the rifle

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