Stock pulley is factory rated at 5.5psi and 345hp.

With 68mm pulley we gain about 20 HP.

KAVS Motorsport supercharger pulley

– 63 mm pulley – ATTENTION – INSTALING THIS PULLEY REQUEST MODIFICATION ON YOUR SUPERCHARGER NOSE HOUSING

If you wish to install this smallest 63 mm pulley on your supercharger nose you should remove some material to reach enough clearance to your pulley.