These Black Chrome finished alternators are ideal for customs, hot rods and muscle cars that want a stock look with high amp output. GM 10SI alternator, Silver Bullet style 140 Amp, 1-wire easy hook up, V groove pulley, low idle internal regulator, and spike resistant diodes. The understated black chrome look compliments any engine compartment. Black chrome finish will not discolor, rust, or fade over time. Provides a consistent, eye-appealing finish for underhood accessories.