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Adding a hydraulic roller camshaft also changes the requirement for the distributor gear. Most street roller cams come with iron distributor drive gears, but if not, then a different distributor gear is required. Crane offers a coated steel distributor gear that is compatible with either the steel or induction-hardened cam cores. Before this new line of gears, the old solution was a softer copper alloy (aluminum-bronze) gear (center), which tended to wear quickly on street-driven engines. View Related Article
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