Wilwood Rear XRD Single-Caliper Drag Brake Kit, M-W/Lamb Axle Ends, Half-Inch Studs and 2.81-Inch Offset

M-W/Lamb axle ends with half-inch studs use the single-XRD rear drag package. Measure the 2.81-inch offset and compare the housing-end bolt centers. The wheel-end assembly is selected by its measured housing-end interface and racing hydraulic arrangement. Camarillo, California, is home to Wilwood Engineering, the disc-brake manufacturer Bill Wood founded in 1977. Wilwood designs and manufactures systems and components including master cylinders, calipers, rotors, valves, fittings and brake lines. Those parts serve motorsport, street-performance and specialized uses and must be selected as part of the complete brake system.

Technical Details

• Caliper configuration: Forged XRD Lug Mount; 4 pistons per caliper; Type III Anodize
• Bracket-to-caliper mounting: Lug
• Pad compound selection: BP-28
• Caliper piston specification: Stainless
• Hydraulic inlet thread: 1/8-27 NPT
• Brake-rotor package: 11.25 × 0.35 inches; Super Alloy; Drilled
• Wheel-diameter reference: 15 in; the complete wheel-clearance drawing determines fit
• Axle-end requirement: Symmetrical End; measured axle offset 2.81 in
• Retained-axle rotor mounting pattern: 5 X 4.50; 5 X 4.75; 5 X 5.00 inches; this does not change the retained hub or axle wheel pattern
• Axle stud requirement: 1/2-inch diameter
• Flexline supply: Not included; supply suitable hoses and fittings separately
• Installation hardware: Included; verify the installed fastener engagement
• Items not supplied: spindles, wheel hubs, master cylinder, brake booster
• Wilwood part number: 140-17881-D
• Conversion type: rear conversion kit; Sold as a kit.

Fitment & Compatibility

Select this rear drag-racing kit by the M-W/Lamb symmetrical housing-end flange and measured 2.81-inch axle offset. The required axle stud diameter is 1/2 inch. One four-piston XRD caliper mounts at each rear rotor; match the bearing retainers and bracket bolt centers. The dynamic lug-drive hats retain the drilled Super Alloy rotors with internal snap rings, allowing the rotor and hat to expand separately. Hat drillings do not alter the axle wheel pattern. Provide hydraulic flexlines separately and use the exact wheel-clearance drawing.

Wilwood product specifications · Wilwood installation and compatibility information · Axle measurement worksheet · Wilwood installation and compatibility information

Before purchase, send PMB Performance the actual housing flange, axle offset, rotor registration and parking or hydraulic arrangement. Our over 20 years of parts and fitment experience helps identify the installation details that need to be checked.

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