Aluminum Smog Pump Delete Pulley Kit For 85-91 Chevy Corvette C4 L98

Application:  For 85-91 Chevy Corvette C4 L98.   Check your vehicle with the type and size as picture shown to match your needs. Specification: 100% quality assurance tested, more responsive, less expensive, easier to install. Fully assembled, bolt on design, chamfered edges. Increase horsepower by reducing engine drag. For off road & race use, on dual exhaust cars only!  !!Purchase of new belt locally is required in some installations due to varying pulley sizes installed by GM according to option requirements.(Several customers have said 87.8" belt works when replacing.) All smog pump pulleys are needed to check within at least every 6 months. How did a smog pump work? Pump Type: The Air Pump, or Air Injector Reactor (AIR), system design is commonly referred to as the smog pump. The smog pump is responsible for supplying fresh, pressurized oxygen into the exhaust stream near the exhaust manifold. The spinning vanes of the air pump forcing air into the diverter valve accompl