Edelbrock/Billet Specialties E-Force Tru-Trac serpentine belt systems are engineered to work exclusively with Edelbrock E-Force Superchargers for small-block Chevy. These kits offer the ultimate in looks and performance. CNC machined from 6061-T6 billet aluminum and polished to a mirror finish, they bolt right on and align perfectly without the need for stabilizer brackets or adjuster bars. They also increase the efficiency of the water pump, alternator and compressor by eliminating belt slippage. Select pulleys are hard-coat anodized for increased durability, preventing wear from the backside of the serpentine belt. In addition to stainless steel ARP fasteners, a 6-rib serpentine belt, and a comprehensive installation manual, these complete systems include polished Powermaster 105 amp 1-wire alternator, polished Sanden SD-7 AC compressor, a polished Edelbrock reverse rotation water pump, polished 6061-T6 billet aluminum pulleys and brackets, and optional Maval Manufacturing power steering pump with AN fittings.