Wilwood GT Front Conversion with Red Superlite Calipers, 12.19-Inch Rotors and Hats, Specified C10 Modular Pro Drop Spindle Fitments

The red GT configuration provides slotted 12.19-inch iron discs on aluminum hats, with Superlite calipers and BP-10 pads. The separate Wilwood C10 ProSpindle assembly supplies the required hubs and spindles; those components are not part of this brake kit. 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 — 140-15302-R.
• Rotor dimensions — outside diameter 12.19 in; 309.63 mm; thickness 1.10 in; 27.94 mm.
• Service caliper assembly — Superlite 6R; 6 pistons in each caliper; Stainless pistons; Forged Aluminium body; Radial mounting.
• Supplied pad compound — BP-10.
• Hat wheel-stud clearance diameter — 0.520 in; 13.21 mm.
• Rotor mounting hat — aluminum; Black E-Coat; hat offset 1.530 in.
• Hydraulic package contents — brake lines included: No; 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; GT Slotted; surface finish: Plain.
• 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.
• Mechanical package contents — no separate hubs included; mounting hardware included: Yes; spindles included: No.
• Flexline specification — Line kit included (manufacturer): None; Front line-kit reference: 220-7056, 220-11237, 220-12168.

Fitment & Compatibility

Confirm the actual model/year and five-lug Aluminum Modular Pro Drop spindle installation below. DS1158 requires the Wilwood spindle system rather than the OE spindle. Verify the correct outward/inward year-based wheel shift, nominal 15-inch wheel envelope and separately chosen front line kit.

Listed model families are 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; the individual year and brake/spindle conditions remain decisive. 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.