The Kenworth W900 and Peterbilt 388 389 Radiator Fan Shroud is a durable and practical replacement part made of fiberglass with pre-drilled holes and gel-coated on the inside for improved air flow. Sold individually and made in the U.S.A., this fan shroud is a direct replacement for OEM part number N4173001 and fits most Kenworth W900, Peterbilt 388, and 389 models. Its high-quality construction and easy installation make it a reliable choice for maintaining optimal engine cooling performance.