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OAP – Overrunning Alternator Pulley

Elite® Overrunning Alternator Pulleys are vehicle-specific and cover a wide range of applications. In addition to reducing accessory drive system vibration, the pulley has a highly sophisticated one-way clutch allowing the alternator to "coast" freely when belt speed is suddenly decreased. This "overrunning" feature eliminates the chirping sounds that often occur during engine shutdown or transmission shifting.

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