Wilwood 140-18152-D FNSL4R Rear Electronic Parking Brake Kit Big Ford New Style 2.50" Offset 12.88" Rotor 6-Lug SRP

The Wilwood 140-18152-D is a Forged Narrow Superlite 4R (FNSL4R) Rear Electronic Parking Brake (EPB) Big Brake Kit engineered for Big Ford New Style rear axles with a 2.50-inch offset. Designed for custom builds, high-performance street machines, and show vehicles that demand serious stopping power along with a fully functional parking brake, this kit delivers a complete cable-free rear brake solution in a single package.

At the heart of this kit are Wilwood's FNSL4R four-piston forged calipers paired with a 12.88-inch two-piece SRP (Street/Race Drilled) rotor and high-performance BP-10 compound brake pads. The BP-10 compound is optimized for balanced, consistent clamping force, making it an ideal complement to front big brake upgrades across all types of performance and show builds.

Key Features:

• Electronic Parking Brake (EPB) caliper — eliminates mechanical parking brake cabling with high-torque static holding power
• Includes EPB control unit and pre-loomed wiring harness for simplified installation and operation
• FNSL4R four-piston forged calipers — narrow profile designed for maximum clearance in tight wheel wells
• 12.88-inch two-piece SRP rotor — drilled and slotted design promotes heat dissipation and resists brake fade
• High-performance BP-10 compound pads — optimized for street and performance driving
• Big Ford New Style axle flange fitment with 2.50-inch offset and 6-lug bolt pattern
• 17-inch or larger wheels required to clear the caliper and rotor assembly
• Multiple caliper finish options and rotor designs available to personalize style and performance

The EPB system replaces traditional mechanical parking brake cables with an electronic actuator integrated into the caliper, controlled via the included harness and control module. This simplifies installation significantly — particularly in custom chassis and restomod builds where routing mechanical cables is difficult or undesirable.

Note: Wilwood Flexline brake lines are required to complete the installation and must be ordered separately. Verify wheel clearance prior to installation — 17-inch minimum wheel diameter is required.