Match the replacement rotor to the brake system already on the truck. Wilwood 160-9987 is a plain-face rear rotor/hat for internal parking-brake systems, identified by its dimensions and registration rather than a broad vehicle-year claim.
 
Fitment
Measured match to the existing internal drum parking-brake disc system; confirm exact kit and rotor number.
 
Specifications
Part 160-9987.
Iron, 32 vanes; 12.19-inch diameter x 0.81-inch thickness; 1.910-inch rotor offset.
3.12-inch registration; wheel bolt circles 5 x 4.50 / 4.75 / 5.00 inches; 0.52-inch stud holes.
 
Included
One rotor/hat component.
 
Before ordering and installation
Rotor offset is not the axle-offset measurement used to select a complete rear kit.
Check registration, offset, parking-brake shoe dimensions and caliper compatibility before ordering; this is not a complete brake conversion.
Manufacturer product information and fitment