1Fitment: Replacement for Ford Super Duty with 6.0L Diesel Engine 2005?2007, OE number is 3C3Z 6A051 Aa. Please check whether this item can fit on your car before purchasing. 2Prevent Diesel Solidification: Block heater element and cord can keep your engine warm in cold weather and prevent diesel from solidifying, causing it to fail to start. 3High Performance: With threaded design, it can directly enter the engine to heat up quickly, allowing the car to start quickly and save unnecessary fuel consumption. 4Durable Materials: Using reinforced metal and rubber materials, high temperature resistance, wear resistance, strong thermal conductivity and long service life. 5Direct Replacement: The heater kit meets or exceeds OEM standards, has passed factory testing, is perfectly matched to the original car, and can be installed directly.