Bosch Alternator that can replace 21SI, 22SI and Leece Neville 4" J-180 Mount with specifications: 12 Volt, 165 Amp, Clockwise, Internal Regulator. Replaces BOSCH 0-124-525-085, AL9960LH. LEECE NEVILLE 110-444, 110-450, 110-550, 110-555HD, 110-555JHO, 110-573,2500LC, 2670LC, 2670LCRM, 2800LC, 2805LC, 8LHA2070, 8LHA2070V, 8LHA2070VA, 8LHA2070VB, 8LHA2070VBH, 8LHA2070VGH. DELCO 21SI, 22SI. Reference 12490, 220-5300.