Direct replacement for factory crankshaft pulley. ScienceofSpeed recommends replacement every 9 years or 100,000 miles (whichever comes first). Factory crankshaft consists of an inner and outer steel pulley bonded with a rubber bushing. The rubber bushing deteriorates with age and can cause the pulley to separate. Pulley separation can result in the timing belt cover cracking resulting in damage to the timing belt and potentially catastrophic engine damage. Several reports of engine damage have resulted from pulleys failing.
As an added level of protection, we offer a pulley shield for additional protection from failure.