Whipple Superchargers 6 Rib black anodized supercharger pulley will increase or drop boost depending on the pulley size diameter. Smaller pulleys will increase boost and larger pulleys will lower boost levels. Each .125" diameter increment is equal to -/+ 1 psi of boost. For help deciding on which pulley to run on your supercharger contact Tech@teamjdm.com or call our office line during business hours.
3.250" Pulley requires a gates K061247 Supercharger Belt