Wilwood Red-Caliper GT Front Disc Package, 14-Inch Spec-37 Rotors and Hats for Listed C10 Wilwood Aluminum Modular Drop Spindles

This red GT assembly combines Superlite 6R calipers, slotted 14-inch rotor rings and aluminum hats. BP-10 pads and the mounting parts are supplied for the documented Wilwood C10 Pro Drop installation, whose hubs and spindles are provided separately. Bill Wood founded Wilwood Engineering in 1977. Based in Camarillo, California, the company designs and manufactures disc braking systems and components for street-performance, motorsport and specialized use. Its calipers, rotors, master cylinders, valves, fittings and brake lines are chosen around the hydraulic, mounting and balance needs of a complete system.

Technical Details

• Manufacturer part number: 140-15304-R.
• Rotor construction and friction surface: Spec-37 Iron; Vented; GT Slotted; surface finish: Black Electro Coat.
• Service caliper assembly: Superlite 6R; 6 pistons in each caliper; Stainless pistons; Forged Aluminium body; Radial mounting.
• Caliper color, finish and hydraulic inlet: Red; Red Powder Coat; inlet 1/8-27 NPT.
• Supplied pad compound: BP-10.
• Wheel bolt circle: 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm.
• Hat wheel-stud clearance diameter: 0.520 in; 13.21 mm.
• Nominal minimum wheel diameter: 18 in; 457.2 mm; verify full spoke and barrel clearance using the kit drawing.
• Rotor mounting hat: aluminum; Black E-Coat; hat offset 1.380 in.
• Mechanical package contents: no separate hubs included; mounting hardware included: Yes; spindles included: No.
• Hydraulic package contents: brake lines included: No; master cylinder included: No; booster included: No.
• Flexline specification: Line kit included (manufacturer): None; Front line-kit reference: 220-7056, 220-11237, 220-12168.
• Brake function and supply: Front Brake Kits - Street Performance; Disc braking; front axle; Sold as a kit.
• Rotor dimensions: outside diameter 14.00 in; 355.6 mm; thickness 1.25 in; 31.75 mm.

Fitment & Compatibility

Use the exact five-lug truck year and model below with Wilwood Aluminum Modular Pro Drop Spindles only. DS1160 supplies the installation geometry, including the different 1963–1970 and 1971–1987 wheel-position baselines. Check the nominal 18-inch wheel drawing and choose separate flexlines for the chassis.

Models represented in the detailed applications: C10 Panel, C10 Pickup, Suburban, 1000 Series, 1000, C10 Suburban, C15/C1500 Suburban, C1500 Pickup, Blazer, Jimmy, C10, K5 Blazer, C15 Suburban, C1500 Suburban, R10 Pickup, R10 Suburban, R1500 Pickup, R1500 Suburban. Each is subject to its individual year, trim and brake/suspension condition. Use the fitment table below to confirm year, model, trim and brake or suspension options.

Select a suitable front hose kit from the listed alternatives after checking the actual chassis fittings, route and full suspension/steering travel.

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.