The Kenworth W900L Painted Steel Lower Coolant Tube is a practical and reliable solution for Kenworth W900L models with Caterpillar 3406E, C15, and C16 engines. With a black finish, this tube is designed to fit seamlessly and enhance the overall look of your vehicle. It is sold individually and is compatible with both OEM and aftermarket numbers K181-5597 and K1815597. This high-quality coolant tube ensures efficient cooling and optimal engine performance, making it an essential component for your Kenworth W900L.