Ford F-150 04-08 5.4L

170A 6G Alternator (2539HO)

This is a very popular replacement where substantial capacity is needed.  This unit will increase the charging capacity at all RPM Ranges with NO modifications. 70 amps at idle (2000 alternator shaft rpm) 170 amps maximum (6000 alternator...

130A 6G Alternator (2539)

This is a very popular replacement where slightly increased capacity is needed.  This unit will increase the charging capacity at all RPM Ranges with NO modifications. 70 amps at idle (2000 alternator shaft rpm) 130 amps maximum (6000...