Search by number: 2017 Ford F-550 Super Duty 6.7L 8 Cyl Alternator ProAmp 11622 $187.00 each OPTIONS: 160 Amps; 8 groove pulley ProAmpN 11622N $297.00 each OPTIONS: 160 Amps; 8 groove pulley Why is there more than one unit for my car? Look at the TECH SPECS when more than one unit is shown for your car. AMPS (ELECTRIC CAPACITY): must match you vehicle electric requirements. *** Call us if you are looking to increase your unit capacity! OE ALTERNATOR MANUFACTURER: It is recommended to match the Make of your alternator