Wilwood Rear TX6R Disc Conversion with OE Parking-Brake Hats and 15.50-Inch GT Rotors, Black Six-Piston Calipers for Selected 4WD SRW Ford F-250/F-350 Super Duty (2005–2012)

Black TX6R calipers operate 15.50-inch GT rotor rings in this rear package for the specified Super Duty 4WD/SRW trucks. Iron parking hats retain the matched original parking-brake assembly, while the hydraulic service brakes use six-piston calipers and separately supplied flexlines. The kit comes from Wilwood Engineering of Camarillo, California, established in 1977 by Bill Wood. Wilwood designs and manufactures disc brake systems and components for motorsport, street-performance and specialized installations. Alongside calipers and brake rotors, its range includes master cylinders, valves, fittings and brake lines, all requiring selection around the complete system's operating requirements.

Technical Details

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

• Manufacturer: Wilwood; manufacturer part number: 140-13868. 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.

• 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

Confirm the exact F-250/F-350 Super Duty year, 4WD and single-rear-wheel layout below. Verify the unresolved 2012 F-350 build-date conditions before ordering. DS1119 requires dust-shield clearance work and identifies separate 2005–2010 and 2011–2012 rear hose kits.

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

With over 20 years of parts and fitment experience, PMB Performance can help check the brake configuration before you order. Include the vehicle information, installed axle or spindle and wheel dimensions in your enquiry.