Search by number: 2010 Audi S4 3.0L 6 Cyl Alternator ProAmp 11466 $182.00 each OPTIONS: Supercharged; 140 Amps ProAmp 11461 $192.00 each OPTIONS: Supercharged; Valeo; 150 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