This was used in an experiment to feed air in to an experimental power generator to prove the concept. Hardly used, did it's job briefly then removed. Comes with a 70mm pulley The Rotorex C15 Supercharger is a high-performance part designed to enhance the power output of a vehicle. With its belt-driven system, this supercharger is capable of efficiently delivering extra air to the engine, resulting in increased horsepower and torque. As a product from Rotorex, known for producing quality automotive components, the C15 Supercharger is a reliable choice for car enthusiasts looking to upgrade their vehicle's performance.