The Western Star Stainless Steel Lower Coolant Tube is a durable and reliable product designed for Western Star models with Caterpillar 3406E, C15, and C16 engines. Made from high-quality 304 stainless steel, this coolant tube offers exceptional strength and longevity. It is sold individually and fits seamlessly into your vehicle's cooling system. With OEM and aftermarket numbers 20406-3501 and 204063501, this coolant tube is a practical and efficient solution for maintaining optimal engine performance. Trust in the Western Star Stainless Steel Lower Coolant Tube for its superior construction and compatibility with various Western Star models.