Components (4) Brake Disc. Disc Design Cross-drilled and Slotted. Location : Front and Rear. 2012 F-250 Super Duty (submodel: King Ranch, Lariat, XL, XLT) 4WD, To 10/21/12. 2012 F-350 Super Duty (submodel: King Ranch, Lariat, XL, XLT) 4WD, SRW, To 10/21/12.