11mm Pulleys are machined from billet 6061 aluminum, T-6 Heat treated and hard anodized for performance, strength and long life. Designed for higher boost ratios. Pulleys can be used with all 11mm blower belts.
Pulleys are: 3.5in wide with a 2in center register.
Center Flange: 1.50in (Ideal for engine using Internal Bearing Support)