Our 10% & 18% OD supercharger lower pulley is a must when wanting to increase boost.
Eliminates torsional crankshaft vibrations
Exceeds SFI 18.1 specs
Black zinc chromate finished
OEM equipment on ZZ572 GM Crate Engines
Tunable, rebuildable, and extremely efficient at ALL RPM
Laser engraved 360° timing marks
Inner and outer shells are available in aluminum or steel, and contain a steel inertia weight. This inertia weight has six (2-ring design) or eight (3-ring design) computer machined grooves to retain the proper durometer O-rings (dyno tested for each application).
