Search by number: 1973 Audi 100 LS 1.9L Alternator ProAmp 13055 $51.00 each OPTIONS: w/AC ProAmp 13054 $59.00 each OPTIONS: wo/AC 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