Wilwood 12.19-inch SRP Rear Parking Conversion for Big Ford New-Style Ends — Black Calipers, 2.50-inch Offset

For the new-style Ford end, this black SRP package combines service brakes and an internal parking brake. The supplied black powder-coated 4-piston calipers and 12.19-inch SRP drilled-and-slotted rotors are configured for Big Ford New Style, 2.50-inch offset. Wilwood Engineering began in 1977 under founder Bill Wood and is based in Camarillo, California. The company designs and manufactures disc brake systems and components for motorsport, street-performance and specialized vehicles. Calipers, rotors, master cylinders, valves, fittings and brake lines must be selected around the needs of the complete system.

Fitment & Compatibility

The decisive measurement for this Big Ford new-style/Torino package is a 2.50-inch axle offset. Do not substitute a new-style kit intended for the 2.36-inch arrangement simply because the housing flange appears similar. DS420 shows the correct mounting stack and wheel-clearance profile. Verify those dimensions on the installed axle, including any aftermarket axle shafts or replacement housing ends. The supplied drum/rotors contain a mechanical parking-brake mechanism, so cable travel and routing also need to be resolved before the vehicle is returned to service. The 1990 Town Car application shown below remains conditional on the specified hardware. Have the housing-end measurements available when asking PMB Performance to help confirm a modified rear axle.

Use the complete vehicle row and its application notes below to check model year, trim and original brake equipment.

Technical Details

• Manufacturer part number: 140-7140-D.
• Calipers: 4 pistons; forged aluminum; stainless steel pistons.
• Caliper attachment: lug mount; 1/8-27 NPT hydraulic inlet.
• Caliper finish: Black Powder Coat.
• Rotor/hat wheel-stud clearance patterns: 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 stud-hole clearance diameters: 0.52 in; 13.21 mm. These are hole sizes, not wheel-stud thread specifications.
• The rotor/hat drilling does not change the vehicle hub or axle wheel bolt pattern.
• Rotor dimensions: 12.19 in; 309.63 mm diameter x 0.81 in; 20.57 mm thick.
• Rotor construction: Iron; vented; SRP Drilled & Slotted friction surface.
• Sold as one kit. Mounting hardware is included. Hubs are not included.
• Brake pads are included; use the compound and installation instructions specified for this rotor package.
• Spindles, master cylinder, brake booster and hydraulic brake lines are not included.
• Housing/flange arrangement: Big Ford New Style.
• Axle flange offset: 2.50 in; 63.5 mm.
• Wheel-size guide: 15 in; 381 mm minimum nominal diameter; verify actual template clearance.

Package and installation requirements

• The rear rotor incorporates a parking drum with internal mechanical shoes. This arrangement keeps the parking function independent of hydraulic pressure at the Dynalite caliper.
• Parking cables and flexible brake lines are not supplied. The referenced universal cable kit is 330-9371; its final fit may involve adapting the cable or the vehicle.

Manufacturer references

• Wilwood product and configuration information
• Installation instructions
• Technical bulletin

With over 20 years of experience, PMB Performance can help you work through the mounting and brake-system details before ordering. Include your vehicle information and any axle, hub or spindle changes when contacting us.

WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.

Vehicle Applications

Application Notes

1. Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
2. Line kit included (manufacturer): None