Wilwood Anodized Rear TX6R Conversion with 15.50-Inch GT Rotors for Listed Ford F-250/F-350 Super Duty 4WD SRW Trucks (2005–2012)

The anodized version of this Super Duty rear package combines TX6R calipers with GT-slotted 15.50-inch rotor rings. Its iron hats preserve the specified original parking interface, and the retained factory hubs must match the documented four-wheel-drive single-rear-wheel installation. Bill Wood established Wilwood Engineering in 1977; the company is based in Camarillo, California. Its disc brake design and manufacturing range covers calipers, rotors, master cylinders, valves, fittings and brake lines, as well as complete systems. Those products serve motorsport, street-performance and specialized applications, with the individual components selected to match the braking system as a whole.

Technical Details

• 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.

• Manufacturer: Wilwood; manufacturer part number: 140-13868-C. 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: Anodize. Finish: Type III Anodize. Inlet thread: 1/8-27 NPT.
• Caliper family: TX6R. Brake-pad compound: BP-22.

Fitment & Compatibility

Match the F-250/F-350 Super Duty application, actual build date and 4WD/SRW hardware. The 2012 F-350 date split needs clarification for the specific truck. Check DS1119 dust-shield modifications, wheel clearance and the correct year-specific rear hose fittings.

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.

Use the fitment table below for the complete model, year, submodel and brake-option conditions; every listed condition must match the installed vehicle.

Manufacturer Documents

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

For help matching the conversion to your existing hardware, contact PMB Performance with the vehicle details and the relevant measurements. Our parts and fitment work draws on over 20 years of experience.