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Cloyes Race Billet True Roller sets are race ready. Both sprockets are machined from premium billet steel on our state-of-the-art CNC equipment, then induction hardened and oil-quenched using our in-house, multi-stage heat treat process. Our premium TrueRoller chain features superior strength with full roller action. Side plates are cut and shaved from high strength steel and heat-treated for maximum fatigue resistance. The .250" rollers are cold rolled and hardened to exacting standards increasing load and RPM capabilities.