Wilwood OE C-Clip Chevrolet 12-Bolt Rear Parking Kit — Black Dynalite, Plain 12.19-inch Rotors, 2.75/2.81-inch Offset

OE C-clip retention is essential when selecting this Chevrolet 12-bolt rear kit. This Forged Dynalite rear disc and parking-brake kit combines black powder-coated 4-piston calipers and 12.19-inch plain-face rotors. Founded in 1977 by Bill Wood and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to work together as a complete brake system.

Technical Details

• Manufacturer part number: 140-7141.
• Rotor dimensions: 12.19 in; 309.63 mm diameter x 0.81 in; 20.57 mm thick.
• Rotor construction: Iron; vented; Plain Face friction surface.
• Calipers: 4 pistons; forged aluminum; stainless steel pistons.
• Caliper attachment: lug mount; 1/8-27 NPT hydraulic inlet.
• Caliper finish: Black Powder Coat.
• Rotor/hat wheel-stud clearance patterns: 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.
• Rotor/hat stud-hole clearance diameters: 0.52 in; 13.21 mm. These are hole sizes, not wheel-stud thread specifications.
• The rotor/hat drilling does not change the vehicle hub or axle wheel bolt pattern.
• Housing/flange arrangement: 12 Bolt.
• Axle flange offset: 2.75 in; 69.85 mm; 2.81 in; 71.37 mm.
• Wheel-size guide: 15 in; 381 mm minimum nominal diameter; verify actual template clearance.
• Sold as one kit. Mounting hardware is included. Hubs are not included.
• Brake pads are included; use the compound and installation instructions specified for this rotor package.
• Spindles, master cylinder, brake booster and hydraulic brake lines are not included.

Fitment & Compatibility

This Chevrolet package is for the original 12-bolt housing-end design with C-clip axle retention. It accepts the specified 2.75- and 2.81-inch axle-offset arrangements; it is not the fixed-bearing Special-end kit. C-clip eliminators or replacement ends change the mounting requirements and are excluded. Compare the actual end with DS421 rather than selecting from a differential-cover description. The vehicle list includes modified GM applications, but their front spindle qualifiers do not identify the rear housing. Check that rear axle independently. Installation retains the original axle-retention arrangement while adding service discs and internal parking shoes. Brake lines, parking cables, wheel clearance and the hydraulic balance of the complete vehicle must be checked as separate parts of the conversion.

Use the wheel-clearance drawing in the installation instructions before purchase. The catalog minimum diameter is a guide; barrel shape, spoke clearance and wheel offset still determine fit.

The application table below identifies the model-year and factory-equipment combinations. Match the entire row, including its numbered notes.

Package and installation requirements

• The one-piece iron drum/rotors incorporate the parking-brake drums; the internal shoes provide a mechanical parking brake independently of the four-piston service calipers.
• Parking-brake cables and hydraulic brake lines are separate. Wilwood references universal cable kit 330-9371; installation can require cable or vehicle modifications.
• Not for Special housing ends or C-clip eliminators.

Manufacturer references

• Wilwood product and configuration information
• Installation instructions
• Technical bulletin

PMB Performance brings more than 20 years of brake and parts experience to fitment questions. Send us the axle or spindle details, current brake equipment and intended wheel dimensions if you need help checking this kit.

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.

Vehicle Applications

Application Notes

1. For OE C-Clip axles only. Does not support Special End or C-Clip Eliminator modifications
2. Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
3. Universal Flexline kits available: 220-7056 (14"), 220-7699 (16") or 220-8307 (18"). Choose correct length for your application.
4. Universal Parking Brake cable kit, may require modifications to cable or vehicle to install.
5. Line kit included (manufacturer): None