The GRC crank pulley is a direct replacement unit that will increase the boost level of the Roush supercharger kit to 8 psi without the belt slip problems of a smaller supercharger pulley. Manufactured to factory tolerances to ensure durability and long life. The original belt is reused. A custom tune is recommended and available through GRC Performance.
GRC crank pulley Advantages:
Produces 8 psi
Retains original belt
No belt slip
Manufactured to factory specs for durability and long life