The R1 Concepts slotted front-left brake rotor for 2004–2008 Ford F-150 4WD is a black replacement rotor with service slots listed for the front-left position. It matches the explicit fitment and drivetrain noted in the source and is offered as the specified slotted rotor for owners of the 4WD F-150 within those model years.
R1 04-08 Ford F-150 4WD Front Left Slotted Black Brake Rotor