Wilwood 140-16347 FNSL4R Rear Big Brake Kit with Electronic Parking Brake

The Wilwood Forged Narrow Superlite 4R (FNSL4R) Rear Electronic Parking Brake (EPB) Big Brake Kit delivers a complete, high-performance rear braking solution for custom, street, and performance vehicles that require an integrated parking brake. Engineered to complement front big brake upgrades, this kit provides optimized and balanced braking performance across a wide range of import and domestic rear axle applications.

Key Features:

• FNSL4R Four-Piston Calipers — Forged narrow-body aluminum construction for maximum strength and minimal weight
• Two-Piece Rotors — Available in 13" or 14" diameter for enhanced heat dissipation and reduced unsprung weight
• BP-10 High-Performance Brake Pads — Optimized friction compound for balanced, high-performance street and track braking
• Electronic Parking Brake (EPB) Caliper — Delivers high static holding torque for secure parking without mechanical cables or traditional handbrake linkage
• Control Unit and Wiring Harness Included — Simplifies installation and integration with modern vehicle electronics
• Wilwood Flexline Brake Lines Included — Ready-to-install stainless braided flex lines for a complete installation
• Optional Caliper Finishes and Rotor Designs — Personalize aesthetics and fine-tune brake performance to match any build style

The FNSL4R Electronic Parking Brake kit eliminates the complexity of traditional mechanical parking brake cables, replacing them with a clean, electronically actuated system. Whether building a dedicated track car, a custom street machine, or a high-performance daily driver, this kit provides the stopping power and parking security the build demands.