Prestolite Special Performance Alternator with specifications: 24 Volt, 90 Amp, Internal Regulator, Brushless Type, Insulated Ground, Mounting J-180, 4" (101.6mm). Replaces PRESTOLITE 140-208-100, 140-209-100, 142-208-100, 143-209-100, 144-209-100, 146-209-100.