OEM Quality Replacement Meets Or Exceeds OEM Specifications Quality Replacement air pump belts for most Porsche® applications. Belts are one of the most overlooked wear and tear items on your vehicle. Do not skip them and be caught on the side of the road because one snapped. NOTE: Inspect your belts for excessive wear or glazing on the smooth side of the belts and inspect the grooved side for cracks. If either one of these conditions is present, it is time to replace your belts. Learn More