Aftermarket Kenworth heater core our part# 110640SL OEM# 110640 110640M. Keep your Kenworth truck warm with our heater core. Fits many of the following Kenworth models: W900, T800, T300, T370, and more. Have questions? Call us at (616) 834-1503. SKU: HV4000-003$131.00$110.00Add to cart