Wilwood rear Dynapro Lug Mount kit for Symmetrical End 2.81-inch offset, half-inch-stud hat mounting: four 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 dual calipers 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: four 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 dual calipers and 11.44-inch drilled rotor in assembled view

Wilwood Rear Dual Dynapro Drag Brake Kit, Lamb/Mark Williams Symmetrical End

SKU: 140-12555-D

$1,637.39 Sale
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Product details

This Wilwood rear drag system uses four Dynapro calipers across the axle, with two four-piston calipers operating at each wheel. The 11.44-inch drilled Super Alloy rings fit lug-drive hats for the specified Lamb/Mark Williams symmetrical end and 2.81-inch offset. The half-inch wheel-stud configuration and housing dimensions must be matched as a complete arrangement. 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: 140-12555-D
  • Type: Dynapro Dual SA Lug Drive Dynamic Rear Drag Brake Kit
  • Calipers: Dynapro Lug Mount; 4 pistons per caliper; Type III Anodize.
  • Caliper quantity: four total, arranged as two four-piston calipers at each rear wheel.
  • Caliper bore sizes: 1.38, 1.38 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: four rear 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

Compare flange holes, bearing register and offset with DS917 and the axle worksheet. Confirm the selected hat pattern and axle center register before checking the dynamic ring attachment. Hydraulic hoses and circuit design are separate from the mechanical package, and dual calipers change the required hydraulic assessment. Check the actual wheel envelope and intended drag-use suitability with the completed chassis rather than relying on a generic axle description.

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.