Balmar Alternator Vortec Internal Reg K6 Serpentine Pulley - 170A - 12V One Size. Balmar installs high reliability bearings robust rectifier diodes and improved heat-sinking capabilities on all our alternators to ensure improved system reliability combined with increased charging power. Specifications for Balmar Alternator Vortec Internal Reg K6 Serpentine Pulley: Manufacturer: Balmar Color: Black Amperage: 170 amps Voltage: 12 volts Features of Balmar Alternator Vortec Internal Reg K6 Serpentine Pulley Vortec Internal Reg K6 Serpentine Pulley 170A 12V Package Contents: Balmar Alternator Vortec Internal Reg K6 Serpentine Pulley Balmar XT-VT-170-IR: Alternator Vortec Internal Reg K6 Serpentine Pulley - 170A - 12V One Size