Wilwood Red Rear Superlite 6R Kit, 14.25-Inch GT Rotors, Listed Ford F-150 Six-Lug Applications with Original Mechanical Parking Brake

Red six-piston Superlite calipers distinguish this F-150 rear conversion, which uses GT-slotted 14.25-inch rings and iron hats for the original mechanical parking brake. The factory hub and parking-shoe assembly are retained, and compatible rear hoses are an additional purchase. Wilwood Engineering has designed and manufactured disc brake systems and components since Bill Wood founded the company in 1977. From its Camarillo, California base, it supplies motorsport, street-performance and specialized applications with calipers, brake rotors, master cylinders, valves, fittings and brake lines. Selecting those components requires a match to the complete system.

Technical Details

• Rotor: 14.25 in; 361.95 mm outside diameter; 1.25 in; 31.75 mm thickness. Material: Spec-37 Iron. Construction: Vented. Friction-face style: GT Slotted.
• Rotor-hat material: Iron. Hat offset: 2.000 inches; this hat dimension is separate from axle offset.
• Rotor surface finish: Black Electro Coat.

• 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: Forged Narrow Superlite 6R. Brake-pad compound: BP-20.

• Manufacturer: Wilwood; manufacturer part number: 140-13866-R. Supplied quantity: Sold as a kit.
• Application category: Rear Brake Kits - Street Performance. Axle/spindle category: Rear Kits. Brake function: Disc; Parking.
• 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.
• The rotor hats retain the specified original mechanical parking-brake shoes and assembly; a replacement parking-brake mechanism is not supplied.

• Wheel interface: 6 x 5.32 in; 6 x 135.13 mm. Rotor/hat wheel-stud clearance: 0.590 in; 14.99 mm.
• Nominal minimum wheel diameter: 18 in; 457.2 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.

Fitment & Compatibility

Match the actual six-lug F-150 or Raptor year and mechanical parking layout below. Electric parking brakes and seven-lug hubs are incompatible. Confirm the DS1110 dust-shield modifications, wheel envelope and exact year/thread/track-width requirements before choosing the separate flexlines.

This is a six-piston Superlite 6R rear kit. It fits only the documented six-lug, mechanical-parking-brake arrangement; seven-lug and electric-parking-brake vehicles are excluded. DS1110 requires the illustrated dust-shield trimming to 9.75 inches diameter. Hoses are separate: DS1110 distinguishes 220-15277 with M10 x 1.0 inverted flare for 2012–2014 and 220-15276 with M10 x 1.5 inverted flare for 2015-up standard-track applications. Wider Raptor routing requires confirmation before choosing a hose; do not select solely by the Raptor badge.

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

Ask PMB Performance for assistance if the installed hardware differs from the documented application. With over 20 years of parts and fitment experience, we can help identify the measurements needed to check the conversion.