.This brand-new IV Truck Guide Pulley comes with OEM part numbers 504006261 and 500318393 for accurate replacement. Made of high-strength durable materials, it runs smoothly and resists abrasion and high temperature. It features precise dimension and perfect compatibility, enabling quick and effortless installation. It keeps the transmission belt system stable, guarantees normal engine operation, and offers a cost-effective and reliable repair solution for IV truck owners.