Our replacement coupler is precision-machined from a solid piece of high-grade **Delrin and installs as a direct replacement for the original. This unit directly replaces the problematic spring loaded factory version. We highly recommend replacing the original isolator with this upgraded unit when an overdrive supercharger pulley is installed on the car.
**Considered the workhorse of plastics, Delrin Acetal resin combines moisture resistance and heat resistance, as well as a wear-resistant surface with an ability to hold tight tolerances. it’s often used for gears, bushings, impellers, and other parts that require its strength and rigidity.