Crafted with precision for your Mustang's comfort and durability, the Motorcraft KH389 heater hose ensures a reliable connection between your V6 4.0L engine and the vehicle's heating system. The hose is designed with a durable EPDM material, offering resistance to petroleum and a long lifespan. Measuring 23.125 inches in length with a 15 mm interior diameter, it's made to fit seamlessly in the engine compartment with clip-on and bolt-on mounting styles. The hose's instant lock female end fittings provide a secure, leak-proof connection, while its matte finish ensures a professional look. With part numbers including 4R3Z18472CB, KH-389, 87897, and 23854, this non-universal, USA-manufactured component is an exact match for specific Ford models, ensuring a perfect fit and optimal performance. Keep your Mustang running smoothly with this top-quality heater hose.