Wilwood Front Dynapro 6 Brake Kit for Ford Bronco Dana 30/44 Drum Spindles (1966–1975), Black, 11.75-Inch Rotors

Black Dynapro six-piston calipers and 11.75-inch vented rotors convert the documented early Bronco drum-spindle arrangement. This kit retains the existing front hubs and includes the listed flexline kit. Founded by Bill Wood in 1977, Wilwood Engineering designs and manufactures disc brake systems from Camarillo, California. Its calipers, brake rotors, master cylinders, valves, fittings and brake lines serve motorsport, street-performance and specialized applications. Individual components must be selected for the complete brake system.

Technical Details

• Manufacturer part number: 140-13303
• Application and package: Front Brake Kits - Street Performance; Front Kits; Disc; Sold as a kit.
• Stud-hole / clearance provision: 0.640 in; 16.26 mm; diameter provision, not a thread designation
• Wheel diameter starting requirement: 15 in; 381 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 1.450 inch; part 170-13313
• Published wheel-position / hub offset: +.00 inch per side; verify against the documented spindle assembly
• Rotor dimensions: 11.75 in; 298.45 mm outside diameter; 0.81 in; 20.57 mm thickness
• Rotor construction: Spec-37 Iron; Vented; Plain Face
• Caliper assembly: Dynapro 6; 6 pistons per caliper; Forged Aluminium body; Lug 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

Fitment & Compatibility

Use the Dana 30/44 drum spindle and the applicable axle-rating/drum-size row. DS1008 covers the required hub and rotor assembly; do not substitute a later factory-disc or GM-converted spindle.

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.

GM disc conversions are excluded. For stock 15-inch steel wheels, DS1008 requires a customer-supplied 0.25-inch-thick wheel spacer in addition to the complete wheel-clearance check.

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 may not fit all 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.

Manufacturer References

• Wilwood exact kit specifications
• Wilwood installation instructions DS1008

PMB Performance has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.

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