Wilwood black XRS6R front brake kit for 1963–1987 Chevrolet / GMC Trucks with Aluminum 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 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles
Wilwood black XRS6R front brake kit for 1963–1987 Chevrolet / GMC Trucks with Aluminum 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 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles

Black XRS6R Calipers and 14.00-inch GT Slotted Rotors — Wilwood Front Kit for 1963–1987 Chevrolet / GMC Trucks with Aluminum ProSpindles

SKU: 140-18302

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Product details

Black XRS6R calipers and 14-inch GT slotted rotors form the larger front package for Wilwood C10 aluminum modular ProSpindles. Each 1.25-inch-thick Spec-37 disc contains 72 curved vanes, with BP-10 pads and flared aluminum hats supplied. Bill Wood established Wilwood Engineering in 1977. From Camarillo, California, the company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications.

Technical Details

Kit contents and separate parts

  • Manufacturer part number: 140-18302
  • 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

A 14-inch front brake envelope and the Wilwood C10 aluminum modular Pro Drop Spindle define this installation. Match the five-lug hub hardware and the individual Chevrolet/GMC truck application in the table; stock spindles will not accept the kit. Wheel-mounting position changes relative to the factory brakes and spindle: outward by 0.41 inch per side for 1963–1970, inward by 0.06 inch for 1971–1987. Allow for those changes when checking wheel and body clearance. Hubs and spindles are not supplied, nor are flexlines. Select the applicable 220-7056, 220-11237 or 220-12168 hose kit. 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.

Rotors and mounting dimensions

  • Rotors: 14.00 in; 355.6 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: 72 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

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

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 has supported brake and restoration projects for more than 20 years. Share your vehicle and installed chassis hardware with us for help selecting the correct brake package.

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