Wilwood New-Style Big Ford Plain-Rotor Rear Kit — Polished Calipers, 2.50-inch Offset, 12.19-inch Parking Brakes

Plain discs accompany polished calipers without changing the 2.50-inch housing requirement. Its polished 4-piston calipers and 12.19-inch plain-face rotors are assembled around the requirements of Big Ford New Style, 2.50-inch offset. Wilwood Engineering, founded by Bill Wood in 1977, designs and manufactures disc brake systems in Camarillo, California. The range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications, with each component chosen to suit the complete brake 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.

Read the full application entry below, including the brake, spindle and numbered-note fields that apply to that vehicle.

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.

Technical Details

• Manufacturer part number: 140-7140-P.
• Calipers: 4 pistons; forged aluminum; stainless steel pistons.
• Caliper attachment: lug mount; 1/8-27 NPT hydraulic inlet.
• Caliper finish: Polished aluminum.
• 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.
• Rotor dimensions: 12.19 in; 309.63 mm diameter x 0.81 in; 20.57 mm thick.
• Rotor construction: Iron; vented; Plain Face friction surface.
• 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.
• 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.

Manufacturer references

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

A vehicle that has already been modified needs a hardware check as well as a model-year check. PMB Performance offers over 20 years of experience to help compare the axle, spindle, wheel and brake details before you order.

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