Search by number: 1981 Audi 4000 & 4000 Quattro 2.2L Alternator ProAmp 14000 $104.00 each OPTIONS: Standard w/AC 75 Amp ProAmp 13129 $112.00 each OPTIONS: Optional wo/AC 65 Amp ProAmp 13109 $112.00 each OPTIONS: Standard wo/AC 55 Amp ProAmp 13122 $153.00 each OPTIONS: Optional w/AC 90 Amp ProAmpN 14000N $166.00 each OPTIONS: Standard w/AC 75 Amp 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