The standard of the industry for years, Manley stainless steel valves are manufactured from high temperature materials and feature swirl polished, performance oriented shapes and durable chrome plated stems. Up to 30% weight reduction over stock insures a stable valve train, even at high rpm’s. Sold each.

Severe Duty: Stainless steel, one-piece construction with fully-machined heads and improved chrome plated stems. This is Manley’s most popular valve line. Works the best when used with cast iron guides. Sold each.

Nitride Severe Duty: Same construction as above, but with black nitride finish. Benefits of nitride are a super-hard and lubricious finish that permits tighter guide-to-stem fit. Can be used with cast iron or nickel-bronze guide in the most severe conditions.

Valves listed for Twin Cam® and Evolution® usage can be used in either engine platform with appropriate machining. Early style (5/16” stem valves) can be used in late (7mm stem valves) heads if guides and springs are used to match, and vice-versa.

Weight 1 lbs
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