Wilwood 140-14142-D Billet Dynapro SA Lug-Drive Dynamic Rear Drag Disc Brake Kit

The Wilwood 140-14142-D is a Billet Dynapro SA Lug-Drive Dynamic Rear Disc Brake Kit featuring Wilwood's proprietary Stainless Super Alloy rotor technology. Engineered for high-demand applications, this kit is ideal for vehicles that rely heavily on rear braking force — including high-speed drag cars and heavy vehicles that generate above-average rear brake heat.

At the heart of this system is Wilwood's innovative lug-drive rotor mounting design. Rather than using traditional rotor bolts, a single large internal snap-ring retains the rotor within the hat for fast, tool-friendly assembly. This floating-style arrangement allows the rotor to expand and contract through heat cycles completely independent of the hat, eliminating thermally induced stress at the rotor attachment points and keeping rotors flatter and running truer under extreme conditions.

The billet aluminum hats are protected by spring-loaded, replaceable stainless steel inserts in each lug-drive slot, preventing the wear that would otherwise occur when brake torque loads the stainless rotor against the softer aluminum hat material.

Key Features:

• Billet Dynapro caliper with SA (Stainless Super Alloy) lug-drive Dynamic rotor
• Lug-drive snap-ring rotor retention — no rotor bolts required
• Floating rotor design isolates thermal stress from attachment points
• Rotors remain flatter and run truer through repeated heat cycles
• Spring-loaded replaceable stainless steel lug-drive slot inserts protect billet aluminum hat
• Available in two rotor diameters: 11.44" standard and 11.25" for bead lock rim clearance
• Available in Single and Dual caliper configurations
• Designed for rear axle drag racing and high-heat performance applications

The Wilwood 140-14142-D delivers race-proven rear braking performance with the serviceability and precision engineering that Wilwood disc brake systems are known for.