Wilwood black XRS6R front brake kit for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles, 12.19-inch slotted rotors and components laid out
Wilwood black XRS6R front caliper with 12.19-inch slotted rotor, assembled brake view for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles
Wilwood black XRS6R front brake kit for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles, 12.19-inch slotted rotors and components laid out
Wilwood black XRS6R front caliper with 12.19-inch slotted rotor, assembled brake view for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles

Wilwood Black XRS6R Front Conversion — 12.19-inch GT Slotted Rotors for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles

SKU: 140-18300

$1,570.29 Sale
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Product details

This compact XRS6R front package uses black six-piston calipers and 12.19-inch GT discs on Wilwood C10 aluminum modular ProSpindles. The 1.10-inch-thick vented rotors mount through shallow-offset hats, allowing a nominal 15-inch wheel envelope subject to the template check. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its components include calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to suit the complete brake system.

Technical Details

Rotors and mounting dimensions

  • Rotors: 12.19 in; 309.63 mm diameter x 1.10 in; 27.94 mm thick; vented Iron
  • Friction faces: GT Slotted
  • Rotor coating/finish: Black Electro Coat
  • Internal vanes: 32 straight
  • Hats: Aluminum; Black E-Coat; 1.530-inch hat offset
  • Rotor/hat wheel-stud clearance patterns: 5 X 4.75 in; 5 X 120.65 mm; 5 X 5 in; 5 X 127 mm

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: 1.75 / 1.25 / 1.25 in

Kit contents and separate parts

  • Manufacturer part number: 140-18300
  • Supply: one brake kit; components for both sides of the axle
  • Mounting hardware: included
  • Hubs: not included
  • Spindles, master cylinder and brake booster: not included
  • Brake flexlines: not included
  • Related installation parts to select for the application: 220-7056; 220-11237; 220-12168

Fitment & Compatibility

Use this 12.19-inch XRS6R kit with Wilwood C10 aluminum modular Pro Drop Spindles and the corresponding five-lug hubs. It cannot mount on original-equipment spindles. The table gives the eligible Chevrolet/GMC truck models. Compared with the original brakes and spindle, the wheels sit 0.41 inch farther outward on each side for 1963–1970 vehicles; the 1971–1987 installation moves them 0.06 inch inward. Hubs and spindles are separate purchases. Choose flexline kit 220-7056, 220-11237 or 220-12168 according to the vehicle and required hose routing. Nominal minimum wheel diameter: 15 in; 381 mm. The linked wheel-clearance diagram must confirm barrel and spoke clearance; wheel diameter alone does not guarantee fit.

Installation documents

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.

PMB Performance brings more than 20 years of brake and restoration experience to parts selection. Contact us with the installed spindle or axle details if you need help matching this kit.

Vehicle Applications

Years Make Model Model option Front brakes Rear brakes Kit application Notes
1963-1967 Chevrolet C10 Panel Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1963-1974 Chevrolet C10 Pickup Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1963-1966 Chevrolet Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1963-1965 GMC 1000 Series Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1963-1966 GMC Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1966 GMC 1000 Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1967-1986 Chevrolet C10 Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1967-1974 GMC C15/C1500 Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1967-1974, 1979-1986 GMC C1500 Pickup Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1970-1974 Chevrolet Blazer Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1970-1982 GMC Jimmy Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1975-1986 Chevrolet C10 Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1975-1982 Chevrolet K5 Blazer Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1975-1978 GMC C15 Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1979-1986 GMC C1500 Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1987 Chevrolet R10 Pickup Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1987 Chevrolet R10 Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1987 GMC R1500 Pickup Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5
1987 GMC R1500 Suburban Vehicles using Wilwood Aluminum Modular ProSpindles, 5 Lug only Drop Drum Front Kit 1, 2, 3, 4, 5

Application Notes

  1. Brake kits require Wilwood C10 Aluminum Modular Pro Drop Spindles to fit. Will not fit original equipment spindles.
  2. Brake kit wheel offset is +0.41 outboard from stock OE brakes and spindle for years 1963 – 1970. Wheel offset is -0.06 inboard from stock OE brakes and spindle for years 1971 – 1987.
  3. This is a front service-brake kit. Any rear parking-brake cable is selected separately for the vehicle's rear brake system.
  4. Line kit included (manufacturer): None
  5. Front line-kit reference: 220-7056, 220-11237, 220-12168