Wilwood Rear Black Dynalite Drilled-Rotor Kit for Staggered-Shock GM 12-Bolt C-Clip-Eliminator Axles — Selected 1964–1974 Applications

Black service and parking calipers are arranged for the staggered-shock 12-bolt conversion in this kit. The drilled-and-slotted 12.19-inch rotors must be centered on the specified axle register and modified housing ends. From Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and their components. Founded by Bill Wood in 1977, it serves street-performance, motorsport and specialized applications with master cylinders, calipers, brake rotors, valves, fittings and brake lines. All components must suit the requirements of the complete system.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-14259-D
• Kit classification: Rear Brake Kits - Street Performance
• Axle position: Rear Kits
• Brake Type: Disc; Parking
• Selling unit: Sold as a kit.
• Minimum wheel guidance (clearance drawing required): 15 in; 381 mm
• Required rear axle / flange: 12 Bolt C-Clip Eliminator
• Catalog axle-offset reference: 2.91 in; 73.91 mm
• Spindle Included: No
• Mounting Hardware Included: Yes
• Separate wheel hubs included: No
• Pistons per service caliper: 4
• Service-caliper piston construction: Stainless
• Service-caliper mount: Lug
• Caliper body construction: Forged aluminum
• Caliper Color: Black
• Caliper Finish: Black Powder Coat
• Caliper Inlet Port Diameter: 1/8-27 NPT
• Caliper family: Dynalite
• Pad compound: BP-10
• Master Cylinder Included: No
• Brake Booster Included: No
• Brake Lines Included: No
• Rotor Outside Diameter: 12.19 in; 309.63 mm
• Rotor Thickness: 0.81 in; 20.57 mm
• Rotor Material: Iron
• Surface Type: SRP Drilled & Slotted
• Rotor construction: Vented
• Bolt Circle Diameter: 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
• Catalog stud / mounting-hole reference: 0.520 in; 13.21 mm
• Rotor surface finish: Black Electro Coat
• Hat material: Aluminum
• Hat finish: Black E-Coat
• Hat offset dimension: 2.000 in

Fitment & Compatibility

DS-1185 specifies the staggered-shock GM 12-bolt C-clip-eliminator rear arrangement, not a front-spindle conversion. Match the modified housing ends, customer-supplied eliminator bearings, 2.91-inch axle offset and 3.06-inch center registration. Vehicle rows referencing Ridetech spindles do not confirm that rear geometry. Hoses, parking cables and their adapters are separate, and the 15-inch wheel guidance requires a template check.

Listed models: Chevelle; 442; Beaumont; Camaro; Apollo. Use the fitment table below for the individual years, submodels and equipment conditions.

Wilwood product specifications · Installation instructions · Technical bulletin

PMB Performance has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.