Wilwood 140-17879-D Forged XRD Lug-Drive Drag Rear Disc Brake Kit Olds/Pontiac Offset - 2.81

The Wilwood 140-17879-D is a Forged XRD Lug-Drive Dynamic Stainless Super Alloy Rotor Rear Drag Brake Kit engineered for Oldsmobile and Pontiac rear axles with a 2.81-inch axle offset and 0.68 hat dimension. This kit is purpose-built for drag race vehicles that place heavy demand on rear braking systems, including high-speed, heavyweight cars that generate above-average rear brake heat.

XRD Lug-Drive Rotor Mounting System:

• Bolt-free rotor mounting — a large single internal snap-ring retains the rotor in the hat, eliminating rotor bolts for faster, easier assembly and installation
• Rotors move independently of the aluminum hats, freely expanding and contracting through heat cycles without transferring thermal stress to the attachment points
• Spring-loaded, replaceable stainless steel inserts in each lug-drive slot protect the aluminum hat from wear caused by brake torque loading
• Hats remain undistorted — no stress from rotor thermal expansion or shrinkage
• Rotors stay flatter and run truer for consistent, fade-resistant performance

Rotor Specifications:

• 11.25-inch diameter Super Alloy scalloped and drilled rotor — sized for clearance with bead lock rims
• Dynamic stainless super alloy construction for superior heat resistance and durability
• Compatible with popular drag race rear axle flange types

XRD Caliper Features:

• Forged aluminum 4-piston XRD caliper designed using FEA (Finite Element Analysis) computer technology
• Type III hard anodized finish inside and out, including piston chambers
• High-temperature seals rated for sustained drag race heat cycles
• Single caliper configuration

The Wilwood 140-17879-D delivers race-proven stopping performance with reduced rotating mass, making it an ideal rear brake upgrade for drag race builds using Oldsmobile or Pontiac rear axle housings.