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Crane Sf Camshaft

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Race-roller camshafts wear out the lifters and valvesprings because of the incredible rate of lift in addition to the large amounts of lift. The Crane SR camshafts lessen this and require a slightly softer valvespring combination for much better durability. We had the Merlins outfitted with Manley Severe-Duty 2.250-inch intake and 1.880-inch exhaust valves and Crane valvesprings, keepers, and retainers.