Powermaster Alternator, GM Original Look, 12SI, 100 amps, 12V, 1-Wire / 3-Wire, Single V-Belt Pulley, Straight Mount, Aluminum Case, Chrome, GM, Each

The alternator worked great on my 66 Pontiac. The chrome finish is beautiful and definitely brings up the overall look under the hood.

Solid upgrade to my 10SI 61 amp. Wasn't able to get above 13 volts before and now I'm sitting at 13.9-4.1volts. Dual 16" electric fans, air bags, sound system with large touch screen, Sniper EFI with timing control, and digital meters.

I love the look and performance of my chrome Powermaster alternator. It has done me a good job for two years.I started getting a battery draw that would discharge the battery after a couple of days. I traced it to the alternator.I contacted Powermaster to see if I could get it repaired. They were excellent in their response to me and I sent the alternator to them. About 5 days later, I got a call from John in returns and he told me that he found several problems with my installation including loose belt and paint on the mounting pad which was preventing a good ground, but that I also had a bad diode. They replaced the diode pack and sent me some instructions for a more proper installation. The work was done at their cost and the alternator was back to me in record time. Cost me $80 including shipping. All told, it was 9 days from the time I shipped until I received the repaired alternator. Their service and attention to detail is second to none!

I was looking for a replacement for an old AC Delco single post alternator. This fit the geometry with some extra pry bar help. Also, changed out v-belt drive wheel. Didn’t necessarily buy it for the shiny bling.

Works great, but the circumference of the pulley is smaller than the alternator I was replacing. I had to buy another fan belt as I ran out of adjustment . New fan belt $28.00.

Had 2 in a row DOA. I called power master just to see if they knew they had an issue. They told me that they did not know where Amazon was getting them, because they do not sell them to Amazon. They suggested I buy one from an authorized seller. So I bought one from Jegs and it worked perfectly.

The media could not be loaded. Easy install and perfect fit for my ‘67 Camaro. Looks great and matches my other chrome/polished parts.

I thought the Chrome was really nice way better than I thought it would be. Bolted right up to my aftermarket brackets it came with nice directions if you wanted to hook it up one wire or pull the rubber plug out and plug in the factory plug it's still going to be a little while before I put the motor in my vehicle I'm sure it's going to work fine after reading all the reviews comes with a little certificate telling you how much it put out at different RPMs.