When you think of high performance valves, you probably think of Manley! Manley is most well known for their stainless steel valves because they've been the some of the best for high performance use. For more than 40 years, Manley has been producing top of the line high performance engine and valvetrain parts for racing and street applications. Their performance products have found their way into some of the top performing race cars of the times. Today, Manley is developing new parts for the LS and Ford Modular motor. JEGS is proud to represent Manley high performance engine parts at great everyday low prices!