Wilwood Front Dynapro 6 Brake Conversion for Selected Chevrolet/GMC Half-Ton Trucks (1951–1959), Black Calipers and Plain 11.86-Inch Rotor/Hubs

The black Dynapro 6 front package replaces the specified half-ton truck drums with integral iron rotor/hubs. Six-piston calipers, bearing components, brackets and a front flexline set complete the 11.86-inch conversion for the matched factory spindle. Wilwood Engineering, established by Bill Wood in 1977 and based today in Camarillo, California, manufactures and designs disc brake systems and their components. The product range covers brake rotors, calipers, valves, master cylinders, brake lines and fittings for motorsport, specialized and street-performance applications. Suitability depends on matching each component to the entire brake system.

Technical Details

• Manufacturer part number — 140-14974.
• Rotor dimensions — outside diameter 11.86 in; 301.24 mm; thickness 1.10 in; 27.94 mm.
• Brake function and supply — Front Brake Kits - Street Performance; Disc braking; front axle; Sold as a kit.
• Flexline specification — Line kit included (manufacturer): 220-7056 (14.00 in); Front line-kit reference: 220-7056.
• Hydraulic package contents — brake lines included: Yes; master cylinder included: No; booster included: No.
• Mechanical package contents — integral rotor/hubs supplied; no separate hubs; mounting hardware included: Yes; spindles included: No.
• Stated OE wheel-hub offset — +0.25 in; verify the documented spindle and reference geometry.
• Hub construction — wheel hubs are integral with the iron rotors; no separate hub assembly is supplied.
• Nominal minimum wheel diameter — 15 in; 381 mm; verify full spoke and barrel clearance using the kit drawing.
• Wheel-stud diameter — 0.50 in; 12.70 mm.
• Wheel bolt circle — 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm.
• Supplied pad compound — BP-10.
• Caliper color, finish and hydraulic inlet — Black; Black Powder Coat; inlet 1/8-27 NPT.
• Service caliper assembly — Dynapro 6; 6 pistons in each caliper; Stainless pistons; Forged Aluminium body; Lug mounting.
• Rotor construction and friction surface — Iron; Vented; Plain Face; surface finish: Plain.

Fitment & Compatibility

Match the exact Fleetline Truck, Suburban, Truck, 100, 100-22, 1500 or 3A application below. The new five-lug patterns exclude original 6x5.50-inch drum wheels. Account for +0.25-inch outward hub offset per side, and verify the complete 15-inch wheel envelope in DS1274.

The application list names Fleetline Truck, Suburban, Truck, 100, 100-22, 1500, 3A. Verify the particular year and suspension/brake option for each model. Use the fitment table below to confirm year, model, trim and brake or suspension options.

With more than 20 years of parts experience, PMB Performance can help review the specified brake arrangement. Include the vehicle year and details of any hub, spindle or suspension changes.

Check the Installation instructions for the full assembly and wheel-clearance requirements.

Manufacturer Warning

Applicable to brake pads only. 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.