Wilwood rear Forged Dynalite Internal kit components for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red calipers and 12.19-inch srp drilled and slotted rotors, with internal parking shoes
Wilwood rear Forged Dynalite Internal assembly for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red caliper and 12.19-inch srp drilled and slotted rotor
Wilwood rear Forged Dynalite Internal kit components for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red calipers and 12.19-inch srp drilled and slotted rotors, with internal parking shoes
Wilwood rear Forged Dynalite Internal assembly for GM K-Series/Blazer/Jimmy 6-Lug 4x4, red caliper and 12.19-inch srp drilled and slotted rotor

Wilwood Rear Red FDLI Drum-Parking Conversion — 12.19-Inch SRP for GM Six-Lug 4x4 (1971–1991)

SKU: 140-18158-DR

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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 Dynalite Internal calipers match 12.19-inch SRP rotors in this six-lug rear package for compatible GM 4x4 applications. The included parking shoes fit within the rotor hats, while the vehicle’s cable connection needs separate selection. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. Wilwood designs and manufactures calipers, brake rotors, master cylinders, valves, fittings and brake lines as part of its disc brake systems and component range for motorsport, street-performance and specialized applications. Each component must suit the requirements of the complete brake installation.

Technical Details

  • Manufacturer part number: 140-18158-DR
  • Service calipers: Forged Dynalite Internal; 4 pistons; lug mount; Red Powder Coat
  • Brake rotors: 12.19 x 0.81 inches; 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: 15-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

The FDLI package fits the documented GM six-lug rear flange at a 2.46-inch axle offset. Confirm the exact 1971–1991 K-series, Blazer/K5 Blazer, Jimmy or Suburban row and check the installed axle rather than relying on the badge. Its 12.19-inch rotor/hat assembly includes a drum for the supplied mechanical parking shoes.

Use DS1673 to compare the housing bolt layout, 3.55-inch axle register and 6 x 5.5-inch lug pattern. The axle flange must be no larger than 7.05 inches and must have the specified 0.050-inch x 45-degree chamfer. Arrange the hydraulic hoses and parking cable/clevis hardware separately before disassembly.

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.

Ask PMB Performance to help confirm the configuration before ordering if the vehicle has modified brakes or running gear. We have over 20 years of experience with parts and fitment; a VIN plus the installed component details gives us the best starting point.

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