Wilwood black XRS6R front brake kit for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles, 14.00-inch slotted rotors and components laid out
Wilwood black XRS6R front caliper with 14.00-inch slotted rotor, assembled brake view for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles
Wilwood black XRS6R front brake kit for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles, 14.00-inch slotted rotors and components laid out
Wilwood black XRS6R front caliper with 14.00-inch slotted rotor, assembled brake view for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles

1963–1987 Chevrolet / GMC Trucks with Wilwood Iron ProSpindles — Wilwood GT Slotted Front Brakes, Black XRS6R, 14.00-inch Rotors

SKU: 140-18299

$2,894.23 Sale
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Fitment questions?

Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.

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Product details

This 14-inch front hub kit combines black XRS6R calipers with 72-vane GT discs for Wilwood iron ProSpindles. Aluminum hubs and dual-pattern 1/2-20 wheel studs are supplied, so the wheel pattern and mounting offset both need to suit the truck. Wilwood Engineering, based in Camarillo, California, has designed and manufactured disc brake systems since its founding by Bill Wood in 1977. The range spans calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.

Technical Details

Calipers and pads

  • Calipers: XRS6R; 6 pistons
  • Caliper finish: Black Powder Coat
  • Body construction: Forged aluminum
  • Pistons: stainless
  • Mounting: radial
  • Hydraulic inlet: 1/8-27 NPT
  • Included pad compound: BP-10
  • Listed piston bore sizes: 1.62 / 1.12 / 1.12 in

Kit contents and separate parts

  • Manufacturer part number: 140-18299
  • Supply: one brake kit; components for both sides of the axle
  • Mounting hardware: included
  • Hubs: included
  • Spindles, master cylinder and brake booster: not included
  • Brake flexlines: not included

Installation documents

Rotors and mounting dimensions

  • Rotors: 14.00 in; 355.6 mm diameter x 1.10 in; 27.94 mm thick; vented Spec-37 Iron
  • Friction faces: GT Slotted
  • Rotor coating/finish: Black Electro Coat
  • Internal vanes: 72 curved
  • Hats: Aluminum; Black E-Coat; 1.880-inch hat offset
  • Hub wheel-stud patterns: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm
  • Stud specification: 1/2-20 in

Fitment & Compatibility

This 14-inch front package fits the listed Chevrolet/GMC trucks when their suspension uses the specified Wilwood iron ProSpindles. It supplies the aluminum hubs and 1/2-20 studs; choose the hub's 5 x 4.50- or 5 x 4.75-inch stud pattern to match the wheels. Account for the published +0.68-inch outward wheel-mounting change on each side when checking the fenders and tires. The larger brake assembly also needs its own wheel-template check. Spindles and flexline kit 220-8307 are separate. Parking-brake cables are unrelated to this front service-brake installation. Consult the fitment table below for the individual year, model and equipment details. Nominal minimum wheel diameter: 18 in; 457.2 mm. The linked wheel-clearance diagram must confirm barrel and spoke clearance; wheel diameter alone does not guarantee fit.

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.

Our team at PMB Performance draws on 20+ years of brake and restoration work. We can help you review the application requirements before you assemble the system.

Vehicle Applications

Years Make Model Model option Front brakes Rear brakes Kit application Notes
1963-1967 Chevrolet C10 Panel Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1963-1974 Chevrolet C10 Pickup Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1963-1966 Chevrolet Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1963-1965 GMC 1000 Series Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1963-1966 GMC Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1966 GMC 1000 Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1967-1986 Chevrolet C10 Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1967-1974 GMC C15/C1500 Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1967-1974, 1979-1986 GMC C1500 Pickup Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1970-1974 Chevrolet Blazer Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1970-1982 GMC Jimmy Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1975-1986 Chevrolet C10 Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1975-1982 Chevrolet K5 Blazer Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1975-1978 GMC C15 Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1979-1986 GMC C1500 Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1987 Chevrolet R10 Pickup Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1987 Chevrolet R10 Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1987 GMC R1500 Pickup Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3
1987 GMC R1500 Suburban Vehicles using Wilwood Iron ProSpindles Drop Drum Front Kit 1, 2, 3

Application Notes

  1. This is a front service-brake kit. Any rear parking-brake cable is selected separately for the vehicle's rear brake system.
  2. Line kit included (manufacturer): None
  3. Front line-kit reference: 220-8307