Wilwood 140-14147-D Billet Dynapro Lug-Drive Dual Rear Drag Disc Brake Kit 11.25in SA Drilled

The Wilwood 140-14147-D is a Billet Dynapro Lug-Drive (DPL) Dual Rear Dynamic Drag Brake Kit featuring an 11.25-inch diameter drilled Super Alloy (SA) rotor with an anodized finish. Engineered for high-performance drag racing applications, this kit is purpose-built for vehicles that generate above-average rear brake heat and rely heavily on the rear brakes for stopping power.

The defining innovation of this kit is the lug-drive rotor mounting system, which eliminates traditional rotor bolts entirely. Instead, a large single internal snap-ring retains the rotor within the hat, making assembly and disassembly straightforward. This floating design allows the rotor to move independently of the aluminum hat as it expands and contracts through heat cycles, eliminating thermally generated stress at the attachment points. The result is a rotor that stays flatter, runs truer, and a hat that resists thermal distortion over the long term.

Key Features:

• Dual caliper configuration for maximized rear braking force in drag racing applications
• 11.25-inch diameter Super Alloy rotor — the smaller diameter provides clearance compatibility with bead lock rims
• Drilled and anodized rotor for reduced weight and improved heat dissipation
• Lug-drive snap-ring retention replaces rotor bolts for tool-free rotor removal and stress-free thermal cycling
• Spring-loaded, replaceable stainless steel inserts in each lug-drive slot protect the aluminum hat from wear caused by rotor loading under brake torque
• Billet aluminum hat resists distortion from thermal expansion and contraction cycles
• Designed for Lamb/MW-style axle ends with 2.81-inch offset

The Wilwood 140-14147-D is sold as a complete kit. The Super Alloy rotor material delivers low rotating and unsprung weight with strong resistance to thermal warping, making it well-suited for strip applications where intermittent high heat spikes are common.