Wilwood Rear Black 12.88-Inch SRP Drum-Parking Kit — FNSL4R for Big Ford New Style, 2.50-Inch Offset

Black Superlite service calipers work with 12.88-inch SRP drilled-and-slotted rotors in this Big Ford rear package. Parking shoes inside the rotor hats provide mechanical holding, with cables and clevis parts selected separately. Founded in 1977 by Bill Wood and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components for motorsport, street-performance and specialized applications. Its range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to work together within a properly matched brake system.

Technical Details

• Manufacturer part number: 140-18151-D
• Rotor specification: Spec-37 Iron, SRP Drilled & Slotted, vented; 12.88 x 1.10 inches
• Caliper specification: 4-piston Forged Narrow Superlite 4R in Black Powder Coat; radial mount
• Included service pad compound: BP-10; Stainless pistons
• Caliper body material: Forged aluminum
• Hydraulic inlet: 1/8-27 NPT
• Rotor/hat wheel-stud clearance pattern(s): 6 x 5.5 in; 6 x 139.7 mm; match the installed hub/axle pattern
• Housing/flange application: Big Ford New Style
• Required axle offset: 2.50 in; 63.5 mm
• Parking brake: included internal drum/shoe assembly; cable and clevis hardware are not included
• Hydraulic brake hoses: not included; select the correct application-specific lines/fittings
• Wheel clearance: 17-inch wheels may fit; verify the manufacturer’s complete caliper/rotor template for the installed wheel
• Supplied as one kit with mounting hardware; spindles, hubs, master cylinder and booster are not included

Fitment & Compatibility

The 12.88-inch Superlite parking package needs a Big Ford New Style housing with the correct large-bearing flange. Verify the 2.50-inch axle offset and 6 x 5.5-inch lug pattern on the installed axle. The generic Town Car entry is conditional on that hardware and does not establish compatibility with a stock 1990 Town Car rear axle.

The supplied internal parking shoes require separate cables and clevis hardware. Use DS1649 to measure the 2.80-inch axle register, check the 6.80-inch maximum flange diameter and apply the specified edge chamfer. Plan new hydraulic hoses/fittings because the original lines cannot connect directly to this conversion.

Check the complete application table below, including its model-year splits and configuration notes.

Manufacturer Resources

• Exact Wilwood kit specifications and wheel-clearance information
• Installation instructions and component list
• Axle-offset measurement worksheet

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.

Ask PMB Performance to help confirm the configuration before ordering if the vehicle has modified brakes or running gear. We have over 20 years of experience with parts and fitment; a VIN plus the installed component details gives us the best starting point.

Vehicle Applications

Application Notes

1. Line kit included (manufacturer): None