If you're looking for a reliable, high-output alternator for your 7.3 Powerstroke, Mean Green 7769 is the perfect choice. With up to 300% more charging power than stock alternators, it's perfect for anyone who wants to avoid charging problems down the road. And because it's precision balanced for smooth operation, you'll never have to worry about it causing any engine vibration. Mean Green 7769 also has a life expectancy of up to 300,000 miles, so you can be sure it will last as long as your truck does. Plus, we offer a 1 year unconditional guarantee on all our products, so you can buy with confidence.