Wilwood black XRS6R front brake kit for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles, 13.06-inch slotted rotors and components laid out
Wilwood black XRS6R front caliper with 13.06-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, 13.06-inch slotted rotors and components laid out
Wilwood black XRS6R front caliper with 13.06-inch slotted rotor, assembled brake view for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles

1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles Front Brake Kit — Wilwood XRS6R, Black, 13.06-inch GT Slotted

SKU: 140-18301

$2,561.06 Sale
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Fitment questions?

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Product details

A 13.06-inch rotor diameter and 1.25-inch disc thickness define this black XRS6R front kit. The GT slotted Spec-37 discs use flared aluminum hats for the Wilwood C10 aluminum modular ProSpindle installation, with BP-10 pads included. Wilwood Engineering designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines. Bill Wood founded the company in 1977; it is based in Camarillo, California, and serves motorsport, street-performance and specialized applications.

Fitment & Compatibility

The 13.06-inch rotor package is specific to Wilwood C10 aluminum modular Pro Drop Spindles, retaining the matching five-lug hub arrangement. Original truck spindles are not compatible. Check the table for the Chevrolet/GMC model and year, then allow for the change in wheel position: 0.41 inch outward per side on 1963–1970 applications, or 0.06 inch inward on 1971–1987 applications, measured against the original brake/spindle combination. Purchase hubs, spindles and hoses separately. The listed flexline choices are 220-7056, 220-11237 and 220-12168; verify the correct vehicle connection and length. Nominal minimum wheel diameter: 17 in; 431.8 mm. The linked wheel-clearance diagram must confirm barrel and spoke clearance; wheel diameter alone does not guarantee fit.

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: 1.75 / 1.25 / 1.25 in

Rotors and mounting dimensions

  • Rotors: 13.06 in; 331.72 mm diameter x 1.25 in; 31.75 mm thick; vented Spec-37 Iron
  • Friction faces: GT Slotted
  • Rotor coating/finish: Black Electro Coat
  • Internal vanes: 48 curved
  • Hats: Aluminum; Black E-Coat; 1.380-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

Kit contents and separate parts

  • Manufacturer part number: 140-18301
  • 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

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.

With over 20 years of experience in brake systems and restoration, PMB Performance can help check the mounting arrangement, wheel clearance and remaining installation parts for your build.

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