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Because of this one-piece pulley-balancersetup, ProCharger chose to go with a bolt-on blower pulley and run atraditional supercharger pulley system. To install the lower pulley,remove the balancer bolt. The ProCharger pulley mounts into place. Thetwo pulleys are secured using a longer bolt and it is torqued down to 37ft-lb and then tightened another 90-degrees.