Wilwood rear Superlite 4R kit for Special Chevy 12-Bolt 3.15-Inch-Bearing Axles, 2.81-Inch Offset, red calipers and 12.88-inch gt slotted rotors laid out, with internal parking-brake assemblies
Wilwood red Superlite 4R caliper and 12.88-inch gt slotted rotor for Special Chevy 12-Bolt 3.15-Inch-Bearing Axles, 2.81-Inch Offset, assembled rear view
Wilwood rear Superlite 4R kit for Special Chevy 12-Bolt 3.15-Inch-Bearing Axles, 2.81-Inch Offset, red calipers and 12.88-inch gt slotted rotors laid out, with internal parking-brake assemblies
Wilwood red Superlite 4R caliper and 12.88-inch gt slotted rotor for Special Chevy 12-Bolt 3.15-Inch-Bearing Axles, 2.81-Inch Offset, assembled rear view

Wilwood Rear GT-Slotted Brake & Internal Parking Kit — Special Chevy 12-Bolt 3.15-Inch-Bearing Axles, 2.81-Inch Offset, Red Superlite 4R, 12.88-Inch Rotors

SKU: 140-9215-R

$2,216.93 Sale
Shipping calculated at checkout.

Fitment questions?

Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.

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Product details

The red GT option supplies 12.88-inch slotted service rotors and an internal drum parking mechanism. It is intended for the specialty Chevy 12-bolt bearing arrangement documented in DS525, with the axle retained using the supplied 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: 140-9215-R
  • Caliper body: Forged aluminum; hydraulic inlet: 1/8-27 NPT
  • Rotor surface finish: Black Electro Coat; rotors are not supplied burnished
  • Rotor/hat wheel-stud clearance pattern(s): 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm; 5 x 5 in; 5 x 127 mm; the existing hub/axle pattern is retained
  • Hat/rotor stud-hole clearance: 0.520 in; 13.21 mm; this is not a wheel-stud thread designation
  • Required axle offset: 2.81 inches; measure from the axle flange to the housing flange as shown in the instructions
  • Parking brake: internal drum/shoe assemblies included; cable, clevis and control hardware are separate
  • Hydraulic hoses: not included; match the separate lines and fittings to the application
  • Kit includes calipers, rotors and mounting hardware; replacement hubs and spindles are not included
  • Not included: master cylinder and brake booster
  • Wheel clearance: 17-inch wheels may fit; check the complete manufacturer caliper/rotor template
  • Quantity: sold as one axle kit
  • Service calipers: 4-piston Forged Narrow Superlite 4R; Red Powder Coat; radial mounting
  • Brake rotors: 12.88 x 1.10 inches; Spec-37 Iron; GT Slotted; vented
  • Included pad compound: BP-10; pistons: stainless steel

Fitment & Compatibility

For the specialty Chevrolet 12-bolt rear housing with the specified 3.15-inch bearing and 2.81-inch axle offset. This retained-bearing configuration is distinct from a factory C-clip axle. Treat the listed vehicle names as conditional applications: the installed housing flange and bearing arrangement must match DS525.

The supplied bearing retainers are fitted with the parking-brake backing-plate assemblies. Verify the 2.80-inch register/adaptor arrangement and 6.61-inch maximum axle flange with the required chamfer. Hydraulic plumbing and parking-cable hardware are not supplied; select them for the completed vehicle.

Review the complete fitment table below before purchase, retaining the restrictions attached to the chosen vehicle.

Adjust and test the mechanical parking brake as directed. Cable routing, tension and shoe adjustment affect its holding ability; do not rely on an untested parking brake alone to secure the vehicle on a slope.

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
1964-1968 Chevrolet Chevelle w/ Ridetech Hub Spindle Drop Drum Rear Kit 1, 2, 3
1964-1969 Chevrolet Chevelle w/ Ridetech Pin Spindle Drop Drum Rear Kit 1, 2, 3
1964 Oldsmobile 442 w/ Ridetech Hub Spindle Drop Drum Rear Kit 1, 2, 3
1964-1969 Pontiac Beaumont w/ Ridetech Hub Spindle Drop Drum Rear Kit 1, 2, 3
1964-1969 Pontiac Beaumont w/ Ridetech Pin Spindle Drop Drum Rear Kit 1, 2, 3
1967-1969 Chevrolet Camaro w/ Ridetech Hub Spindle Drop Drum Rear Kit 1, 2, 3
1967-1969 Chevrolet Camaro w/ Ridetech Pin Spindle Drop Drum Rear Kit 1, 2, 3
1970 Oldsmobile 442 w/ Ridetech Pin Spindle Drop Drum Rear Kit 1, 2, 3
1973-1974 Buick Apollo w/ Ridetech Hub Spindle Drop Drum Rear Kit 1, 2, 3
1973-1974 Buick Apollo w/ Ridetech Pin Spindle Drop Drum Rear Kit 1, 2, 3

Application Notes

  1. Universal Flexline kits available: 220-7056 (14"), 220-7699 (16") or 220-8307 (18"). Choose correct length for your application.
  2. Universal Parking Brake cable kit, may require modifications to cable or vehicle to install.
  3. Line kit included (manufacturer): None