Wilwood 170-14991 Big Brake Dynamic Lug Drive Rotor Hat

The Wilwood 170-14991 is a high-performance disc brake rotor hat featuring the innovative Big Brake Dynamic Lug Drive system. This advanced rotor mounting design eliminates traditional rotor bolts and allows rotors to move independently of the hat as they expand and contract through heat cycles, removing all thermally generated stress from attachment points.

Key Features:

• Dynamic lug drive system eliminates rotor mounting bolts for stress-free thermal expansion
• Spring-loaded stainless steel inserts protect aluminum hat from wear during brake torque loading
• Single snap-ring retention system enables tool-free rotor installation and removal
• Prevents rotor distortion, pad knock back, and rotor drag caused by thermal cycling
• Eliminates bolt hole alignment issues when installing new rotors on used hats
• Maintains consistent brake response and pedal feel throughout heat cycles
• Lightweight aluminum construction reduces unsprung and rotating mass
• No torquing or safety wiring of rotor bolts required

This rotor hat is engineered for high-performance and racing applications where consistent braking performance under extreme thermal conditions is critical. The innovative lug drive design keeps rotors flatter and running truer while protecting both the hat and rotor from thermal stress damage.