Search by number: 1997 Audi A8 & A8 Quattro 4.2L Alternator ProAmp 13773 $185.00 each OPTIONS: Quattro Models Option 150 Amp ProAmp 13772 $185.00 each OPTIONS: Quattro Models Standard 115 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