🔩 Upgrade Your Ride with Confidence! Crafted from premium steel, designed to withstand the rigors of high-performance applications. Compatible with Powermaster and most GM alternators, making it a must-have for any enthusiast. Zinc-plated for superior rust and corrosion protection, keeping your engine looking sharp. Easily adapts GM alternators to 5/8" belts, ensuring a perfect fit. Simple bolt-on design for quick and easy belt conversion, so you can get back on the road. 5/8" belt compatibility Premium steel construction Zinc-plated for durability The Speedway GM Alternator Pulley is a premium zinc-plated steel adapter designed for seamless compatibility with 5/8" belts. It fits Powermaster and most GM alternators, featuring a bolt hole length of .71" for easy installation. Built to resist rust and corrosion, this durable pulley is perfect for automotive enthusiasts looking to enhance their engine's performance.