Wilwood 140-18161-D Forged Narrow Superlite 4R Rear Electronic Parking Brake Kit 12.88 Rotor 6 Lug

The Wilwood Forged Narrow Superlite 4R (FNSL4R) Rear Electronic Parking Brake Kit delivers a complete big brake upgrade solution for popular muscle car rear axles, purpose-built for vehicles requiring an integrated parking brake system. Engineered for 1971–1991 Blazer applications with a 6-lug bolt pattern, this kit pairs high-clamping four-piston calipers with a precision-machined 12.88" two-piece rotor for optimized, balanced rear braking performance.

Key Features:

• FNSL4R Four-Piston Calipers – Forged narrow-body design provides exceptional clamping force while clearing a wide range of wheel styles
• 12.88" Two-Piece Rotor – Precision-vented rotor design maximizes heat dissipation and reduces unsprung weight
• Electronic Parking Brake (EPB) – High-torque static holding mechanism replaces traditional mechanical cabling for a clean, modern installation
• BP-10 High-Performance Brake Pads – Compound optimized for street performance, providing consistent bite and fade resistance
• Control Unit & Harness Assembly Included – Simplifies wiring and integration, reducing installation time and complexity
• 6-Lug Bolt Pattern – Designed to fit the factory axle flange configuration on applicable 1971–1991 Blazer rear axles
• Compatible with custom, show car, and high-performance street machine builds requiring a matched rear big brake upgrade

This kit is an ideal complement to Wilwood front big brake upgrades, allowing builders to achieve balanced front-to-rear braking performance. The electronic parking brake eliminates the need for mechanical parking brake cables, streamlining the build process on custom chassis and restomod projects. Optional caliper finishes and rotor configurations allow for further personalization to suit individual style and performance goals.

Part Number: 140-18161-D | Rotor Diameter: 12.88" | Bolt Pattern: 6 Lug | Caliper Type: FNSL4R | Pad Compound: BP-10