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Manley offers several different styles of stainless steel valves that range from the stock replacement valves to high-quality stainless steel valves that operate as well on the street as on the track. For street engines, the Manley Street Master series of stainless valves works very well. A hot trick for street engines (that isn't legal for NHRA Stock Eliminator) is to perform a 30-degree back cut on the valve (arrow) to improve low-lift flow. View Related Article
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