Wilwood 140-17474-D Powerlite 4-Piston Front Big Brake Kit with Drilled & Slotted Rotors

The Wilwood 140-17474-D Powerlite Front Big Brake Kit is a bolt-on front brake upgrade featuring forged aluminum Powerlite PL4R radial-mount 4-piston calipers and oversized vented rotors. The kit uses the factory spindle and upright assembly for a clean, direct-fit installation with no custom fabrication required.

At the heart of the kit are 11.38" x 0.81" (289mm x 20mm) vented, drilled and slotted rotors formulated from Wilwood's proprietary Spec37 iron alloy. The directional vented design features curved internal vanes that actively circulate cooling air, providing greater brake torque and superior resistance to thermal distortion compared to solid OEM rotors. The SRP drilled and slotted rotor surface further enhances bite and heat dissipation under hard braking.

Key Features:

• Forged Powerlite PL4R 4-piston radial-mount calipers finished in gloss black powder coat
• 11.38" x 0.81" vented, drilled and slotted rotors in Wilwood's proprietary Spec37 iron alloy
• Pistons sized to maintain proper front-to-rear brake bias
• Low-profile caliper design compatible with 15" minimum wheel diameter
• Quick-clip top pad retainer for fast, tool-friendly pad changes
• Street-friendly BP-10 performance brake pads included
• Complete hardware kit and stainless steel braided flex lines included
• Wheel studs included (user supplies lug nuts appropriate for wheels used)
• Installs using factory disc spindle mount — no spindle modification required
• Delivers approximately 53% reduction in unsprung rotating mass versus OEM cast iron brakes

Important Notes: This kit is designed for use with the factory spindle and upright assembly. A 914/6 or 911 19mm master cylinder is required and must be sourced separately. Minimum wheel diameter of 15 inches is required for caliper clearance. Calipers are also available in gloss red powder coat or 24 additional custom colors (additional charges may apply).