Wilwood Red TX6R Rear Brake Package, GT-Slotted 15.50-Inch Rotors, Selected Ford F-250/F-350 Super Duty 4WD Single-Rear-Wheel Trucks (2005–2012)

Red six-piston TX6R calipers work with 15.50-inch GT rotor rings and iron parking hats in this matched Super Duty rear conversion. The kit retains the specified factory mechanical parking system and hub arrangement rather than supplying a new parking-shoe assembly or wheel hub. Camarillo, California is the home of Wilwood Engineering, the disc brake systems and components manufacturer founded by Bill Wood in 1977. It designs and manufactures calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications. The requirements of the complete brake system determine which individual components are appropriate.

Technical Details

• Manufacturer: Wilwood; manufacturer part number: 140-13868-R. Supplied quantity: Sold as a kit.
• Application category: Rear Brake Kits - Street Performance. Axle/spindle category: Rear Kits. Brake function: Disc.
• Separate wheel hubs included: No. Retain only the hub arrangement specified for this kit.
• Mounting hardware included: Yes. Spindles included: No. Master cylinder included: No. Brake booster included: No.
• Flexible brake lines included: No. Select the vehicle-end connection and routing separately.
• Additional installation parts: 220-14165; 220-14166.
• The rotor hats retain the specified original mechanical parking-brake shoes and assembly; a replacement parking-brake mechanism is not supplied.

• Calipers: 6 stainless pistons per caliper; radial mounting; forged aluminium bodies. Color: Red. Finish: Red Powder Coat. Inlet thread: 1/8-27 NPT.
• Caliper family: TX6R. Brake-pad compound: BP-22.

• Wheel interface: 8 x 6.69 in; 8 x 169.93 mm. Rotor/hat wheel-stud clearance: 0.640 in; 16.26 mm.
• Nominal minimum wheel diameter: 20 in; 508 mm. Verify the full wheel-clearance drawing; diameter alone does not establish barrel or spoke clearance.
• Housing/spindle flange: OEM. Flange/axle offset: 0.00 in; 0 mm.

• Rotor: 15.50 in; 393.7 mm outside diameter; 1.38 in; 35.05 mm thickness. Material: Spec-37 Iron. Construction: Vented. Friction-face style: GT Slotted.
• Rotor-hat material: Iron. Hat offset: 3.410 inches; this hat dimension is separate from axle offset.
• Rotor surface finish: Black Electro Coat.

Fitment & Compatibility

Verify the exact F-250/F-350 Super Duty build information, four-wheel drive and single rear wheels in the table below. Confirm the unclear 2012 F-350 date conditions, then use DS1119 for the required dust-shield clearance, 20-inch wheel envelope and year-specific flexline selection.

Use only the documented four-wheel-drive, single-rear-wheel F-250/F-350 Super Duty arrangement. Confirm the exact trim, brake package and production-date split. The 2012 F-350 entries contain inconsistent January/December build-date limits, so a vehicle in that gap needs individual confirmation before purchase.

Flexlines are not included. DS1119 identifies rear kit 220-14165 for 2005–2010 and 220-14166 for 2011–2012, and specifies dust-shield trimming to 13.00 inches diameter. Retain the compatible original mechanical parking-brake assembly.

Manufacturer Documents

• Wilwood product specifications and wheel-clearance drawing
• Installation instructions

PMB Performance has over 20 years of experience with parts and fitment details. We can help review the installed brake arrangement when you provide the vehicle specification and the measured mounting interfaces.