The TRANS-DAPT Double Groove Lower Pulley #9603 is specifically designed to fit SB Chevrolet V8 engines from 1955 to 1968. This high-quality pulley from Trans-Dapt features a double groove design to provide additional support for accessory belts, ensuring optimal performance and durability in car and truck applications. With a focus on precision engineering and compatibility with specific vehicle models, this new in box pulley is a reliable choice for enhancing the performance of your vehicle's engine.