Wilwood Rear Black Brake Kit - Chevrolet 12-Bolt Rear Axles, Staggered Shocks and 2.75 / 2.81-inch Offset, FDLI and Drilled/Slotted 12.19-inch Rotors

Drilled and slotted one-piece rotors differentiate this black-caliper Chevrolet 12-bolt kit. Its staggered caliper positions and internal drum parking system require the stated axle offset and original C-clip retention. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its component range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines. Every component must suit the complete brake system in which it operates.

Technical Details

Rotors and mounting dimensions

• Rotors: 12.19 in; 309.63 mm diameter x 0.81 in; 20.57 mm thick; vented Iron
• Friction faces: SRP Drilled & Slotted
• Rotor finish: Black Electro Coat
• Internal vanes: 32 straight
• Rotor/hat wheel-stud clearance patterns: 5 x 4.75 in; 5 x 120.65 mm

Calipers and friction components

• Calipers: Forged Dynalite Internal; 4 pistons per caliper
• Caliper finish: Black Powder Coat
• Body construction: Forged aluminum
• Piston material: stainless
• Caliper mounting: lug
• Hydraulic inlet: 1/8-27 NPT
• Included pad compound: BP-10
• Listed piston bore sizes: 1.38 / 1.38 in

Kit contents and separate parts

• Manufacturer part number: 140-9315-D
• Supply: one kit with brake components for both sides of the rear axle
• Mounting hardware: included
• Hubs: not included
• Spindles, master cylinder and brake booster: not included
• Hydraulic hoses: not included
• Required axle housing end: 12 Bolt
• Axle offset: 2.75 in; 69.85 mm; 2.81 in; 71.37 mm
• Includes internal drum parking-brake assemblies and one-piece rotor/hat assemblies.

Fitment & Compatibility

For the Chevrolet 12-bolt housing and 2.75/2.81-inch axle-offset configuration with staggered shock mounts shown in DS-540. Use original C-clip axle retention; C-clip eliminators and special aftermarket housing ends are excluded. The right caliper mounts behind the axle and the left caliper ahead of it. Treat the modified-vehicle entries in the table below as conditional: their front Ridetech spindle references do not verify this rear axle. Match flange and axle dimensions, shock space and wheel clearance before selection. Hoses, cables and clevises are separate; universal parking cable kit 330-9371 is available. Nominal minimum wheel diameter: 15 in; 381 mm. Compare the actual wheel barrel and spokes with the linked clearance drawing; diameter alone does not establish fit.

Installation documents

• Installation instructions
• Technical bulletin

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.

PMB Performance brings more than 20 years of brake and restoration experience to parts selection. Contact us with the installed spindle or axle details for help matching this kit.

Vehicle Applications

Application Notes

1. For OE C-Clip axles only. Does not support Special End or C-Clip Eliminator modifications
2. Hats drilled for 7/16", 1/2" & 12mm studs.
3. Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
4. Kit designed for staggered shock mount rear ends: R/H caliper is rear mount, L/H caliper is front mount.
5. Universal Flexline kits available: 220-7056 (14"), 220-7699 (16") or 220-8307 (18"). Choose correct length for your application.
6. Universal Parking Brake cable kit, may require modifications to cable or vehicle to install.
7. Line kit included (manufacturer): None