Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The M-W/Lamb large-stud rear kit uses dual XRD calipers and drilled lug-drive rotors. Confirm 11/16-inch studs and the 2.81-inch housing offset. The wheel-end assembly is selected by its measured housing-end interface and racing hydraulic arrangement. The manufacturer is Wilwood Engineering, founded by Bill Wood in 1977 and based in Camarillo, California. Wilwood designs and manufactures disc brake systems along with calipers, rotors, master cylinders, valves, fittings and brake lines. Motorsport, street-performance and specialized applications each call for components matched to the overall braking arrangement.
Technical Details
- Wheel envelope: 15 in; the complete wheel-clearance drawing determines fit
- Rear housing interface: Symmetrical End; measured axle offset 2.81 in
- Rotor hat bolt-circle specification: 5 x 5.00; 5 x 4.75 inches; this does not change the retained hub or axle wheel pattern
- Axle stud requirement: 11/16-inch diameter, as specified in the exact installation instructions
- Hydraulic hose selection: Not included; supply suitable hoses and fittings separately
- Hardware provision: Included; verify the installed fastener engagement
- Not included: spindles, wheel hubs, master cylinder or brake booster
- Manufacturer identification: 140-17884-D
- Application and supplied quantity: rear conversion kit; Sold as a kit.
- Hydraulic service-caliper specification: Forged XRD Lug Mount; 4 pistons per caliper; Type III Anodize
- Caliper attachment: Lug
- Brake pads supplied: BP-28
- Piston type: Stainless
- Service-caliper port: 1/8-27 NPT
- Rotor assembly specification: 11.25 × 0.35 inches; Super Alloy; Drilled
Fitment & Compatibility
The large-stud M-W/Lamb rear package combines dual XRD calipers with drilled Super Alloy rotors and dynamic lug-drive hats. Verify the symmetrical housing-end dimensions, 11/16-inch studs and 2.81-inch axle offset against DS-1611. Each rotor requires clearance for two calipers and their plumbing, and the 11.25-inch nominal rotor diameter alone does not prove wheel fit. Snap rings retain the rotor in its hat, allowing separate thermal movement; hat drilling leaves the axle wheel pattern unchanged. Provide the hydraulic flexlines separately and confirm the bracket and bearing-retainer arrangement on the actual racing axle.
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.
