Wilwood Red Dynapro 6 Front Disc and Hub Package, 11.86-Inch Plain Rotors, Listed Chevrolet/GMC 1951–1959 Half-Ton Drum-Spindle Trucks

Red six-piston calipers clamp the plain-face 11.86-inch rotor/hubs in this truck conversion. Each iron casting incorporates the wheel hub, so the kit supplies the hub function without a separate bolt-on hub assembly; front hoses and mounting components are included. The manufacturer, Wilwood Engineering, was founded by Bill Wood in 1977 and is based in Camarillo, California. It designs and manufactures disc systems and component parts across motorsport, street-performance and specialized applications, including calipers, brake rotors, master cylinders, valves, fittings and lines. Those individual parts must be selected in the context of the complete brake system.

Technical Details

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

Fitment & Compatibility

Verify the listed 1951–1959 Chevrolet/GMC half-ton model and original drum spindle. Choose the correct 5x4.75 or 5x5.00 wheel pattern; the factory six-lug drum wheel is incompatible. Include the +0.25-inch hub shift in wheel-position checks and compare the DS1274 clearance drawing.

Listed model families are Fleetline Truck, Suburban, Truck, 100, 100-22, 1500, 3A; the individual year and brake/spindle conditions remain decisive. Use the fitment table below to confirm year, model, trim and brake or suspension options.

PMB Performance has over 20 years of experience with parts and fitment details. Contact us with the original vehicle specification and any changes to its braking or suspension system.

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.