Wilwood Red Rear Disc/Parking Kit with Drilled 12.88-Inch Rotors for Big Ford New Style 2.50-Inch Offset Axles, Staggered Caliper Mounting

Red Superlite calipers and drilled-and-slotted rotors identify this staggered-mount rear kit. The parking shoes act inside the aluminum hats, while the bracket geometry places each hydraulic caliper on the side of the axle needed to clear the specified shock arrangement. The manufacturer, Wilwood Engineering, was founded in 1977 by Bill Wood and is based in Camarillo, California. Its design and manufacturing work covers disc brake systems and components, including calipers, rotors, master cylinders, valves, fittings and brake lines. Motorsport, street-performance and specialized installations each require the individual parts to suit the complete brake system.

Technical Details

• Manufacturer: Wilwood; manufacturer part number: 140-13677-DR. 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.
• Internal parking-shoe assemblies are included. The vehicle cable/clevis connection is separate; parking cable kit 330-9371 is a separately selected option, not included.

• Wheel interface: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm. Rotor/hat wheel-stud clearance: 0.520 in; 13.21 mm.
• Nominal minimum wheel diameter: 17 in; 431.8 mm. Verify the full wheel-clearance drawing; diameter alone does not establish barrel or spoke clearance.
• Housing/spindle flange: Big Ford New Style. Flange/axle offset: 2.50 in; 63.5 mm.

• Calipers: 4 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 4R. Brake-pad compound: BP-10.

• Rotor: 12.88 in; 327.15 mm outside diameter; 1.10 in; 27.94 mm thickness. Material: Spec-37 Iron. Construction: Vented. Friction-face style: SRP Drilled & Slotted.
• Rotor-hat material: Aluminum. Hat offset: 1.540 inches; this hat dimension is separate from axle offset.
• Rotor surface finish: Black Electro Coat.

Fitment & Compatibility

Match the measured Big Ford New Style flange, bearing and 2.50-inch offset to DS1052. Verify the actual axle before using the 1990 Town Car row as a fitment decision. Check both caliper positions, wheel space and the separately required hose and cable components.

For staggered shock mounts, the right-hand caliper mounts behind the axle and the left-hand caliper ahead of it. Verify this orientation against the shock and suspension clearance.

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
• Technical bulletin

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.