DB Electrical HO-8314-220 New Alternator for High Output 220 Amp 4.6L 4.6 Mercury Marauder 03 04 2003 2004 3W3U-10300-AA 3W3Z-10346-AA 8314 GL-547 100% New aftermarket high output alternator built to meet OEM specifications 1-year warranty protects you after your purchase Factory direct pricing with no middleman markup delivers exceptional value Specs: Under full load conditions, amperage output at 1200 engine rpm will peak at 220 Amps, amperage output at 600 engine rpm (idle) will peak at 110 Amps