Wilwood 170-17863 Lug Drive Dynamic Disc Brake Rotor Hat - 5-Lug

The Wilwood 170-17863 is a Lug Drive Dynamic Disc Brake Rotor Hat featuring Wilwood's advanced bolt-free rotor mounting system designed for high-performance street and competition applications. Compatible with 5 x 4.50", 4.75", and 5.00" bolt patterns with 1/2" wheel stud holes, this hat is engineered to pair with an 11.25" diameter x 0.35" thick drilled rotor and is retained by a 7.18" snap ring (part no. 300-11931).

Unlike traditional fixed-mount hats, the Lug Drive Dynamic system eliminates rotor mounting bolts entirely, allowing the rotor to float and move independently of the hat as it expands and contracts through heat cycles. This removes all thermally generated stress from the rotor attachment points, keeping rotors flatter and running truer for more consistent brake response and pedal feel.

Key Features:

• Bolt-free Lug Drive rotor mounting system eliminates thermal distortion at attachment points
• Rotor floats independently of hat through heat cycles — no warping, no bolt hole misalignment
• Eliminates pad knock-back and rotor drag for consistent, reliable braking performance
• Spring-loaded, replaceable stainless steel inserts in each lug-drive slot protect the aluminum hat from wear under brake torque loading
• Large single snap-ring rotor retention — fast, simple assembly with no torque specs or safety wire required
• Precision-machined from premium-grade aluminum alloy for high strength and low rotating weight
• Compatible with 5 x 4.50" / 4.75" / 5.00" bolt patterns, 1/2" wheel stud hole
• Designed for use with Wilwood 11.25" drilled stainless rotor (p/n 160-17867) and snap ring kit (p/n 300-12561)

The 170-17863 is a direct component in Wilwood's Lug Drive Dynamic brake system, eliminating the common bolt hole alignment headaches associated with re-installing rotors on a previously used hat. Assembly is straightforward — the rotor seats into the hat and a single snap ring locks everything in place.