This brand-new belt tensioner pulley fits CF65, LF45 and LF55 trucks with multiple OEM reference numbers. It maintains optimal tension for engine drive belts, preventing belt slack, slipping and vibration. Adopting high-temperature resistant alloy and premium built-in bearing, it runs smoothly under harsh engine working conditions. Made to standard OEM specifications, it is easy to install and serves as a perfect replacement for worn original pulleys.