Trying to get more RPM out of your factory alternator at idle? This Motion Raceworks overdrive pulley is the trick. It's a 3-inch outer diameter billet pulley machined from 6061 aluminum right here in the USA. It's designed for the common 6-rib LS factory-style alternators (like those on LS1, LS2, LS3, LS6, LS7, LS9 engines). Installation is simple: just remove your stock pulley with a puller and press this one on. The kit even includes two shims (0.019\ and 0.039\) to help you get the perfect alignment for your specific bracket setup. A smaller pulley spins the alternator faster at lower engine RPM, which can help with electrical system performance, especially if you're running a big stereo or extra accessories. Just make sure to check the provided chart to see how it pairs with your crank pulley size. A simple, high-quality upgrade for your LS engine bay.
