The Kenworth W900L Stainless Steel Lower Coolant Tube is a durable and reliable replacement part for OEM numbers F66-1677 and F661677. Constructed from 304 stainless steel, this tube is sold individually and is designed to fit most Kenworth W900L models with a Cummins ISX engine. Its sturdy construction ensures long-lasting performance, making it a practical and cost-effective solution for your cooling system needs. Whether for OEM or aftermarket use, this coolant tube is a dependable choice for maintaining the efficiency and reliability of your vehicle.