Kraftwerks Supercharger Cogged Pulley (159-99-900C) 40210 this 1/2" open cell polyurethane

this 1/2" open cell polyurethane foam pre-filter is washable and reusable

This system works with your factory engine hardware

Improves fuel economy and reduces emissions

9 hardware for absolutely zero-slip

The patented Venturi housing has been designed to provide the maximum internal volume possible for the S3 engine bay space available and provides laminar flow to the turbo tube

Kraftwerks Supercharger Cogged Pulley (159-99-900C) 40210 this 1/2" open cell polyurethaneIf you want your ROTREX supercharger work more efficiently, then it is vital to provide it with ROTREX or KRAFTWERKS pulleys as they will improve your vehicle performance. The supercharger compresses the air into the combustor and the pulley enables its spinning, so the faster the supercharger spins the more air will be compressed. That's why having a proper pulley will provide a pressure boost and therefore will increase the supercharger efficiency.