Wilwood Red Superlite 6R Front Brake Kit with 12.88-Inch SRP Rotors, Bronco Dana 30/44 Drum Spindles (1966–1975)

Red Superlite calipers operate against drilled-and-slotted 12.88-inch rotor rings in this early Bronco kit. The hat-mount arrangement reuses the specified hubs and includes the flexible brake connections. From Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and their components. Founded by Bill Wood in 1977, it serves street-performance, motorsport and specialized applications with master cylinders, calipers, brake rotors, valves, fittings and brake lines. All components must suit the requirements of the complete system.

Technical Details

• Manufacturer part number: 140-13304-DR
• Application and package: Front Brake Kits - Street Performance; Front Kits; Disc; Sold as a kit.
• 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
• 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; Red calipers; Red Powder Coat

Fitment & Compatibility

Confirm the axle capacity and original drum diameter in the application rows, not year alone. Compare the Dana drum spindle, hub and wheel profile with DS1009 before installation.

Documented model groups, subject to each year, submodel and spindle/axle qualification: Ford Bronco. Application distinctions include 2700 Lbs Axle, 10" inch Drum Brakes; 3300 Lbs Axle, 11" inch Drum Brakes; 2900 Lbs Axle, 10" inch Drum Brakes.

Bronco drum-spindle applications: 1966–1973 with 2700-lb axle and 10-inch drums;1966–1975 with 3300-lb axle and 11-inch drums;1974–1975 with 2900-lb axle and 10-inch drums. Confirm the actual axle rating and spindle.

The original hub has a 3.57-inch drum-register step. The wheel must seat flush on the hub face; a separately supplied wheel spacer is needed if that step interferes.

DS1009 additionally documents a GM disc-conversion mounting path with a different bolt/spacer arrangement. Identify the actual converted spindle and use that specific assembly procedure; the drum path is not interchangeable.

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

Manufacturer References

• Wilwood exact kit specifications
• Wilwood installation instructions DS1009

For fitment assistance backed by more than 20 years of experience, share the installed brake configuration with PMB Performance before ordering.

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