Wilwood Superlite 6R Front Conversion for C10 Wilwood Modular Pro Drop Spindles, Black Calipers and GT 14 x 1.25-Inch Rotors

Black six-piston Superlite calipers operate 14-inch Spec-37 rings on aluminum hats in this front C10 package. BP-10 pads and mounting parts are included for the specified modular Pro Drop suspension, with hubs and hydraulic hoses excluded from the brake kit. Wilwood Engineering is based in Camarillo, California; Bill Wood founded the company in 1977. Disc brake system design and manufacturing includes calipers, rotors, master cylinders, pressure valves, fittings and brake lines for motorsport, street-performance and specialized applications. Component selection must account for how the complete brake system mounts, operates and balances.

Technical Details

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

Fitment & Compatibility

Match the listed five-lug Chevy/GMC application and Wilwood Aluminum Modular Pro Drop Spindles required by DS1160. The separately purchased spindle kit supplies its hub assembly. Verify +0.41-inch outward wheel position for 1963–1970 or -0.06 inch inward for 1971–1987, and compare full nominal 18-inch clearance.

The application list names 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. 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.

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

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.