Optimize electronic performance by upgrading to the 120 amp alternator. Larger than the factory 85 amp alternator, our version uses factory correct pulley size. Like all electronic components, eventually your alternator will wear out. When it’s time to replace your 40 year old unit, consider the upgrade to our factory-correct units. Your local auto parts store isn’t going to have this in stock or be able to match our performance. These come pre-tested to ensure you are getting the best unit available. If you’ve added any electrical components to your car that weren’t factory, you may not be getting the proper charge or voltage throughout your systems. These 120 Amp upgrades help ensure all your electronics are getting the correct voltage over the factory 94 amp system. We promise you won’t regret this upgrade.