"Supercharger pulley, 17% reduction in diameter with blind hole fitment to ensure perfect alignment, bolt on and made from stainless steel - The best. The installation of this pulley will increase boost to 1Bar. Minispeed has tried and tested several pulleys and found these to be the best. They also wear less as most other aftermarket pulleys are made from low-grade Aluminium.
N.B We strongly recommend that if you are changing your pulley you purchase the pulley removal tool to remove your original pulley with, part number amp-eng-207. PLUS, a smaller supercharher pulley belt, part number 6pk1370 "