Wilwood 140-16347-D FNSL4R Rear EPB Big Brake Kit 12.88in Drilled Black Calipers

The Wilwood 140-16347-D Forged Narrow Superlite 4R (FNSL4R) Rear Electronic Parking Brake Big Brake Kit delivers a complete, cable-free big brake upgrade for import and domestic rear axles that demand an integrated parking brake solution. Featuring a 12.88-inch drilled two-piece rotor and black powdercoated four-piston FNSL4R calipers, this kit is engineered to complement front big brake upgrades on custom and high-performance builds.

At the heart of the system is Wilwood's Electronic Parking Brake (EPB) caliper, which eliminates the need for mechanical cables or actuators entirely. The EPB system delivers high static holding torque for secure parking while requiring zero voltage or amp draw once engaged — a clean, modern solution for any performance build.

The kit ships with a control unit and wiring harness assembly, streamlining installation and operation. Drilled rotors promote consistent bite, heat dissipation, and a distinctive appearance under the wheel. High-performance BP-10 compound brake pads are included to provide optimized, balanced braking force across all operating conditions.

Kit Features:

• Forged Narrow Superlite 4R (FNSL4R) four-piston rear calipers — black powdercoat finish
• 12.88-inch drilled two-piece rotor assemblies with aluminum hat
• Electronic Parking Brake (EPB) — no cables or mechanical actuators required
• High static clamping force with zero amp draw after actuation
• BP-10 high-performance brake pad compound included
• EPB control unit and wiring harness assembly included
• Brake lines included
• Bolt-on fitment designed for specific rear axle applications

Wilwood Engineering, headquartered in Camarillo, California, has been designing and manufacturing high-performance disc brake systems since 1977. The FNSL4R EPB kit is an ideal rear brake upgrade for enthusiasts seeking a fully integrated, high-performance parking brake solution without sacrificing clean aesthetics or braking balance.