New ALTERNATOR FITS Isuzu NPR 3.9 Turbo Diesel w/Vac Pump 2912760000, 8970237331 100% NEW and Made with the Highest Quality Components Available Full One Year Warranty Computer tested for consistent Quality and unsurpassed reliability Alternator - Voltage: 12V Amperage: 70 Amps Fan: External Regulator: Internal Pulley: V Belt Grooves: 2 Source: Aftermarket