Wilwood Black SRP Rear Disc & Parking Brakes for Chevrolet OE 12-Bolt — 12.19-inch, C-Clip Retention

The drilled-and-slotted Chevrolet package is intended for OE ends, not a C-clip eliminator conversion. The supplied black powder-coated 4-piston calipers and 12.19-inch SRP drilled-and-slotted rotors are configured for Chevrolet 12-bolt OE C-clip, 2.75/2.81-inch offset. Wilwood Engineering began in 1977 under founder Bill Wood and is based in Camarillo, California. The company designs and manufactures disc brake systems and components for motorsport, street-performance and specialized vehicles. Calipers, rotors, master cylinders, valves, fittings and brake lines must be selected around the needs of the complete system.

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.

Check the actual wheel against the manufacturer template, including the inner barrel and back of the spokes. A nominal wheel diameter by itself does not guarantee clearance.

Use the complete vehicle row and its application notes below to check model year, trim and original brake equipment.

Technical Details

• Manufacturer part number: 140-7141-D.
• 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.
• Rotor dimensions: 12.19 in; 309.63 mm diameter x 0.81 in; 20.57 mm thick.
• Rotor construction: Iron; vented; SRP Drilled & Slotted friction surface.
• 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.
• 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.

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

With over 20 years of experience, PMB Performance can help you work through the mounting and brake-system details before ordering. Include your vehicle information and any axle, hub or spindle changes when contacting us.

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