Wilwood red XRS6R front brake kit for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles, 12.88-inch slotted rotors and components laid out
Wilwood red XRS6R front caliper with 12.88-inch slotted rotor, assembled brake view for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles
Wilwood red XRS6R front brake kit for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles, 12.88-inch slotted rotors and components laid out
Wilwood red XRS6R front caliper with 12.88-inch slotted rotor, assembled brake view for Chevrolet / GMC Trucks with Wilwood Iron ProSpindles

Wilwood XRS6R Front Brake Kit for 1963–1987 Chevrolet / GMC Trucks with Wilwood Iron ProSpindles — 12.88-inch GT Slotted, Red

SKU: 140-18298-R

$2,684.31 Sale
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Product details

GT slotted rotors and red XRS6R calipers identify this front package for the listed Wilwood iron ProSpindle applications. Its 12.88 x 1.10-inch discs bolt to hats on the included hubs, and BP-10 pads complete the six-piston service-brake assembly. 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 12.88-inch hub kit requires Wilwood iron ProSpindles on the Chevrolet/GMC truck applications listed in the table. Supplied aluminum hubs carry 1/2-20 studs in either the 5 x 4.50- or 5 x 4.75-inch pattern selected for the wheels. The spindles are purchased separately. Wilwood specifies a +0.68-inch wheel-mounting offset per side, so confirm tire-to-fender clearance as well as the brake envelope. The required hydraulic connection uses separately selected flexlines, with 220-8307 listed for this package. This is a front service brake with no parking mechanism. 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: Red 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

Rotors and mounting dimensions

  • Rotors: 12.88 in; 327.15 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: 48 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

Kit contents and separate parts

  • Manufacturer part number: 140-18298-R
  • 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

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 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