Wilwood Big Brake Dynamic Lug Drive Hat

Wilwood Big Brake Dynamic Lug Drive Hats are lightweight aluminum rotor hats (also called rotor mounting hats or rotor adapters) for use with Wilwood lug drive big brake rotors. They use a bolt-free rotor mounting system. The rotor can move independently of the hat as both parts expand and contract through heat cycles.

Key Features:

• Bolt-free lug drive design: Removes the rotor mounting bolts, so there is nothing to torque or safety wire.
• Reduced thermal stress: Heat-generated stress is removed from the rotor attachment points. This helps the rotor stay flatter and run truer.
• Consistent braking feel: Pedal feel and brake response stay consistent. Pad knock-back and rotor drag are reduced.
• Replaceable stainless steel inserts: Spring-loaded inserts in the lug-drive slots protect the aluminum hat from wear caused by rotor loading under braking torque.
• Snap-ring rotor retention: A single large snap ring holds the rotor in the hat. This makes rotor changes quick and simple.
• Easier rotor replacement: Bolt hole alignment problems from thermal distortion, which can occur when a new rotor goes on a used hat, are eliminated.
• Precision-machined aluminum construction: Machined from aluminum alloy for strength while keeping rotating weight low.

Wilwood builds its brake components in the USA. These hats suit street performance, road racing, and drag racing applications where heat management and quick rotor service matter.