Wilwood 140-17475 Powerlite MC4 Rear Disc Brake Kit with Parking Brake

The Wilwood 140-17475 Powerlite MC4 Rear Parking Brake Kit is a complete bolt-on disc brake upgrade engineered for performance street and track applications. Utilizing the stock rear upright mounting points, this kit delivers a straightforward path to four-piston Powerlite caliper performance without requiring custom fabrication or spindle modifications.

At the core of the kit are Wilwood's forged aluminum Powerlite four-piston calipers, renowned for their compact profile, light weight, and rigid clamping force. The calipers are finished in a durable powder coat and feature a quick-clip top pad retainer for fast pad changes. An integrated MC4 mechanical parking brake mechanism is built into the rear caliper assembly, and all necessary parking brake cables are included.

The kit ships with 11.38" (289mm) vented two-piece rotor and hat assemblies featuring Wilwood's proprietary Spec37 iron alloy with 36 curved vanes for superior heat dissipation and resistance to thermal distortion. Rotors are available in plain face or SRP drilled and slotted patterns depending on the variant ordered. Aluminum hubs are included and contribute to a significant reduction in unsprung rotating mass compared to stock cast iron components.

Kit Includes:

• Forged aluminum Powerlite 4-piston calipers (powder coat finish)
• MC4 mechanical parking brake integrated into caliper
• 11.38" vented two-piece rotor and hat assemblies (Spec37 iron alloy)
• Aluminum hubs
• BP-10 performance brake pads
• Stainless steel braided flexlines (p/n 220-17483)
• Parking brake cable kit
• All required mounting hardware

Installation Notes: This kit is designed to use the stock rear upright mounting. A 914-6 or 911 19mm master cylinder is required for proper brake bias and system pressure. Verify wheel clearance before installation. Caliper inlet fitting is 1/8-27 NPT. Refer to Wilwood instruction sheet DS-1568 for full torque specifications and assembly steps.