Compatible for D13 Engine. The Cold Charge Air Hose Mack/Volvo #561.62690 is a high-quality silicone CAC hose designed for Mack/Volvo trucks. It features an ID of 3.375 inches on both sides, a centerline length of 6.375 inches on the long side, and is suitable for placement in the upper front area of the vehicle. This hose is an interchange part with Mack numbers 20550690 and 45MD384M, as well as OE/OEM parts S22672 and 45MD384M. It is a reliable and durable component for maintaining proper engine cooling in Mack/Volvo trucks.