Wilwood rear Forged Narrow Superlite 4R kit components for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red calipers and 12.88-inch srp drilled and slotted rotors, with internal parking shoes
Wilwood rear Forged Narrow Superlite 4R assembly for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red caliper and 12.88-inch srp drilled and slotted rotor
Wilwood rear Forged Narrow Superlite 4R kit components for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red calipers and 12.88-inch srp drilled and slotted rotors, with internal parking shoes
Wilwood rear Forged Narrow Superlite 4R assembly for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red caliper and 12.88-inch srp drilled and slotted rotor

Wilwood Rear Six-Lug GM 4x4 Parking Conversion (1971–1991) — Red Superlite, 12.88-Inch Drilled/Slotted

SKU: 140-18160-DR

$2,216.93 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

Red Superlite calipers and 12.88-inch SRP rotors give this six-lug rear conversion its specification. The GM housing flange and register must match the instructions, and the included parking shoes require separate cable hardware. Based in Camarillo, California, Wilwood Engineering has designed and manufactured disc brake systems and components since Bill Wood founded the company in 1977. Its work spans motorsport, street-performance and specialized applications, with a product range covering master cylinders, calipers, brake rotors, valves, fittings and brake lines. These parts must be chosen for the requirements of the entire brake system.

Technical Details

  • Manufacturer part number: 140-18160-DR
  • Service calipers: Forged Narrow Superlite 4R; 4 pistons; radial mount; Red Powder Coat
  • Brake rotors: 12.88 x 1.10 inches; Spec-37 Iron; SRP Drilled & Slotted; vented construction
  • Pads: BP-10; piston material: Stainless
  • Caliper body material: Forged aluminum
  • Hydraulic inlet: 1/8-27 NPT
  • Rotor/hat wheel-stud clearance pattern(s): 6 x 5.5 in; 6 x 139.7 mm; match the installed hub/axle pattern
  • Housing/flange application: K5 Blazer / K10
  • Required axle offset: 2.46 in; 62.48 mm
  • Parking brake: included internal drum/shoe assembly; cable and clevis hardware are not included
  • Hydraulic brake hoses: not included; select the correct application-specific lines/fittings
  • Wheel clearance: 17-inch wheels may fit; verify the manufacturer’s complete caliper/rotor template for the installed wheel
  • Supplied as one kit with mounting hardware; spindles, hubs, master cylinder and booster are not included

Fitment & Compatibility

Use this 12.88-inch Superlite rear package on the specified K5 Blazer/K10 housing flange with 2.46-inch axle offset. The table identifies the matching GM six-lug 4x4 models and year splits across 1971–1991, including the related GMC and Suburban applications. Mechanical parking-brake cables must be matched to the supplied internal shoe assemblies.

Before assembly, verify a 3.55-inch axle register and the 6 x 5.5-inch wheel-stud layout. The maximum flange diameter is 7.05 inches, with the drawing’s 0.050-inch x 45-degree edge chamfer. DS1675 explains the rotor/hat alignment and parking-shoe adjustment; cable/clevis parts and hydraulic hoses are not included.

Confirm the applicable vehicle entry and all numbered notes in the fitment table below.

Manufacturer Resources

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.

For fitment help, contact PMB Performance with your VIN and details of any axle, spindle or brake changes. Our team has over 20 years of experience checking parts and fitment, including the dimensions that a model-year search cannot establish.

Vehicle Applications

Years Make Model Model option Front brakes Rear brakes Kit application Notes
1971-1974, 1987-1991 Chevrolet Blazer 4 x 4 Disc Drum Rear Kit 1
1971-1991 GMC Jimmy 4 x 4 Disc Drum Rear Kit 1
1971-1974 GMC K15/K1500 Pickup 4 x 4 Disc Drum Rear Kit 1
1971-1974 GMC K15/K1500 Suburban 4 x 4 Disc Drum Rear Kit 1
1975-1986 Chevrolet K10 4 x 4 Disc Drum Rear Kit 1
1975-1986 Chevrolet K10 Suburban 4 x 4 Disc Drum Rear Kit 1
1975-1986 Chevrolet K5 Blazer 4 x 4 Disc Drum Rear Kit 1
1975-1978 GMC K15 4 x 4 Disc Drum Rear Kit 1
1975-1978 GMC K15 Suburban 4 x 4 Disc Drum Rear Kit 1
1979-1986 GMC K1500 4 x 4 Disc Drum Rear Kit 1
1979 GMC K1500 Suburban 4 x 4 Disc Drum Rear Kit 1
1980-1986 GMC K1500 Suburban 4 x 4 Disc Drum Rear Kit 1

Application Notes

  1. Line kit included (manufacturer): None