Wilwood Plain 12.19-Inch Rear Brake Kit with Red D154 Calipers for GM 12-Bolt Axles, 2.75 or 2.81-Inch Offset

Plain rotors, red D154 calipers and internal parking shoes suit the GM 12-bolt interface. Match the offset and forward-of-axle mounting. Disc brake system design and manufacturing are Wilwood Engineering’s focus. Bill Wood founded the Camarillo, California company in 1977; its range spans brake rotors, master cylinders, calipers, fittings, valves and brake lines for motorsport, specialized and street-performance applications. The choice of individual components depends on the complete brake system.

Technical Details

• Manufacturer: Wilwood
• Manufacturer part number: 140-15641-R
• Kit classification: Rear Brake Kits - Street Performance
• Axle position: Rear Kits
• Brake Type: Disc; Parking
• Selling unit: Sold as a kit.
• Pistons per service caliper: 2
• Service-caliper piston material: Stainless
• Service-caliper mounting: Floating
• Caliper body construction: Forged aluminum
• Caliper Color: Red
• Caliper Finish: Red Powder Coat
• Caliper Inlet Port Diameter: M10 x 1.50
• Caliper family: D154
• Pad compound: BP-10
• Rotor Outside Diameter: 12.19 in; 309.63 mm
• Rotor Thickness: 0.81 in; 20.57 mm
• Rotor Material: Iron
• Surface Type: Plain Face
• 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
• Rotor-hat mounting-hole clearance diameter (not stud thread): 0.52 in; 13.21 mm
• Rotor surface finish: Plain
• Rotor vane / construction reference: 32 V
• Minimum wheel diameter guidance; verify clearance drawing: 16 in; 406.4 mm
• Required spindle / rear housing interface: 12 Bolt
• Required axle-flange offset: 2.75 in; 69.85 mm; 2.81 in; 71.37 mm
• Spindle Included: No
• Mounting Hardware Included: Yes
• Separate wheel hubs included: No separate wheel hubs; one-piece rotor-and-parking-hat units included
• Master Cylinder Included: No
• Brake Booster Included: No
• Brake Lines Included: No

Fitment & Compatibility

This rear package is for the specified GM 12-bolt flange with either a 2.75-inch or a 2.81-inch axle-flange offset, not any arbitrary offset between them. Calipers mount forward of the rear axle, and the specified application uses C-clip axle retention. Verify the housing flange, axle register, shock/parking-cable clearance and exact offset using DS-1320 and the worksheet. The Ridetech front pin/hub-spindle conditions in the vehicle table do not establish rear-axle compatibility. Those vehicle assignments remain unverified until the rear geometry is confirmed. Two-piston floating D154 calipers have M10 × 1.50 hydraulic inlets. Hoses are separate; verify a D154-compatible banjo connection and the actual routing rather than assuming a generic NPT hose kit connects directly. Internal parking shoes are included; cables, clevises and adapters are separate. Check flange diameter/chamfer and the 3.06-inch rotor center with the supplied 2.80-inch register adapter. Manufacturer wheel guidance is 16 inches; any smaller-wheel exception requires the specific template and wheel check.

Listed models: Chevelle; 442; Beaumont; Camaro; Apollo. See the supplied table below for each year, submodel and equipment condition.

Wilwood product specifications · Installation instructions · Technical bulletin

With more than 20 years of parts and fitment experience, PMB Performance can help compare the existing brake assembly with the required component.

Manufacturer warning — brake pads only: WARNING: Cancer and Reproductive Harm. www.P65Warnings.ca.gov.