Search by number: 2015 Ram 3500 5.7L 8 Cyl Alternator ProAmp 11299 $174.00 each OPTIONS: All; Ndenso unit; 160 Amps ProAmp 11477 $189.00 each OPTIONS: All; Mitsubishi unit; 180 Amps ProAmpN 11299N $242.00 each OPTIONS: All; Ndenso unit; 160 Amps 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