Wilwood rear Dynapro Lug Mount kit for Symmetrical End 2.81-inch offset, half-inch-stud hat mounting: paired gray calipers, 11.44-inch drilled rotors and hardware laid out
Wilwood rear Dynapro Lug Mount kit for Symmetrical End 2.81-inch offset, half-inch-stud hat mounting: gray caliper and 11.44-inch drilled rotor in assembled view
Wilwood rear Dynapro Lug Mount kit for Symmetrical End 2.81-inch offset, half-inch-stud hat mounting: paired gray calipers, 11.44-inch drilled rotors and hardware laid out
Wilwood rear Dynapro Lug Mount kit for Symmetrical End 2.81-inch offset, half-inch-stud hat mounting: gray caliper and 11.44-inch drilled rotor in assembled view

Wilwood Rear Dynapro Drag Brake Kit, Symmetrical Lamb/Mark Williams End, Half-Inch Studs

SKU: 140-12549-D

$1,070.81 Sale
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Product details

Wilwood's symmetrical-end rear drag kit combines single four-piston Dynapro calipers with 11.44-inch drilled Super Alloy rings. The lug-drive hat package is for the specified Lamb/Mark Williams-style housing end, 2.81-inch axle offset and half-inch wheel studs. It is a measured custom-axle installation rather than a vehicle-model-specific service brake replacement. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company designs and manufactures disc brake systems and components, including calipers, brake rotors, master cylinders, valves, fittings, and brake lines for motorsport, street-performance, and specialized applications.

Technical Details

  • Manufacturer part number: 140-12549-D
  • Type: Dynapro SA Lug Drive Dynamic Rear Drag Brake Kit
  • Calipers: Dynapro Lug Mount; 4 pistons per caliper; Type III Anodize.
  • Caliper bore sizes: 1.75, 1.75 inches. Piston type: Stainless.
  • Included pad compound: BP-28.
  • Rotors: 11.44-inch diameter × 0.35-inch thickness; Drilled; Super Alloy; Plain surface; solid, unvented.
  • Rear housing end: Symmetrical End.
  • Required axle flange offset: 2.81 inches.
  • Wheel bolt circles: 5 X 4.50; 5 X 4.75; 5 X 5.00 inches.
  • Included: paired calipers, pads, rotors, mounting brackets and assembly hardware, rotor hats.
  • Hydraulic lines and fittings selected separately. No master cylinder, booster or spindles are supplied.
  • Conditional wheel screening size: 15 inches. Use the installation clearance diagram to verify the actual barrel and spoke profile.
  • Wheel-stud selection: half-inch wheel studs as specified by the installation drawing; the selected hat has 0.520-inch clearance holes.
  • Axle-flange limit: 6.29-inch maximum outside diameter with the specified 0.050-inch × 45-degree chamfer. Match the register and stud configuration to the exact installation drawing.

Fitment & Compatibility

Use DS911 and the axle worksheet to compare housing bolt spacing, bearing diameter and rotor registration. Verify that the selected hat pattern matches the wheel studs and that the axle flange clears the rotor assembly. The 0.35-inch solid ring is part of a drag-racing package, so establish the intended duty and system balance with Wilwood. Hydraulic hoses and fittings are separate from the supplied mechanical brake hardware.

Wilwood installation documents: Installation instructions; Technical bulletin.

PMB Performance has over 20 years of brake-system experience. Contact us with your vehicle details and installed brake hardware for help confirming the correct arrangement.

California Proposition 65 warning, brake pads only: 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.