Wilwood Front 12.88-Inch SRP Brake Conversion with Black Superlite Calipers, Bronco Dana 44 Disc Spindles (1976–1977)

Drilled-and-slotted 12.88-inch rotors accompany black six-piston calipers in this later early-Bronco front package. It is built around the factory disc spindle and existing compatible hub, with hoses included. The manufacturer, Wilwood Engineering, was established by Bill Wood in 1977 and is based in Camarillo, California. It designs and builds disc brake systems with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Motorsport, street-performance and specialized applications require components selected for the complete braking system.

Technical Details

• Manufacturer part number: 140-13305-D
• Application and package: Front Brake Kits - Street Performance; Front Kits; Disc; Sold as a kit.
• Rotor dimensions: 12.88 in; 327.15 mm outside diameter; 1.25 in; 31.75 mm thickness
• Rotor construction: Spec-37 Iron; Vented; SRP Drilled & Slotted
• Caliper assembly: Forged Narrow Superlite 6R; 6 pistons per caliper; Forged Aluminium body; Radial mount
• Piston and finish specification: Stainless pistons; Black calipers; Black Powder Coat
• Hydraulic inlet: 1/8-27 NPT
• Wheel bolt pattern(s): 5 x 5.5 in; 5 x 139.7 mm
• Stud-hole / clearance provision: 0.640 in; 16.26 mm; diameter provision, not a thread designation
• Wheel diameter starting requirement: 17 in; 431.8 mm; verify the individual wheel against the installation drawing
• Included mechanical components: Mounting hardware: Yes; hub(s): No; spindle(s): No
• Hydraulic components supplied: Master cylinder: No; brake booster: No; brake lines: Yes
• Specified pad compound: BP-10
• Separate rotor-hat specification: Aluminum; Black E-Coat; offset current exact kit and hat pages list 1.000 inch, while the linked installation parts list labels 1.300 inches; manufacturer confirmation required before relying on this dimension; part 170-13314
• Published wheel-position / hub offset: +.00 inch per side; verify against the documented spindle assembly

Fitment & Compatibility

Confirm the original Dana 44 disc components rather than a GM conversion. Inspect the required shield modification and spoke clearance using DS1010 before fitting the hat and rotor.

Documented model groups, subject to each year, submodel and spindle/axle qualification: Ford Bronco.

For 1976–1977 Bronco Dana 44 factory-disc spindles only. GM disc-brake/spindle conversion components are excluded.

The included stainless steel braided hydraulic hose kit is 220-13319, listed as 14.00 inches. Route it with adequate steering and suspension clearance.

Kit will not work with GM Disc Brake / Spindle components.

Manufacturer References

• Wilwood exact kit specifications
• Wilwood installation instructions DS1010

PMB Performance can help identify the required brake component with over 20 years of parts experience. Send the kit details and original-part measurements.

Review the complete application table below with the year, submodel and installation qualifications above.