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

The Wilwood 140-18161 is a complete Forged Narrow Superlite 4R (FNSL4R) Rear Electronic Parking Brake (EPB) kit designed for 1971–1991 Blazer rear axles with 6-lug bolt patterns and a 12.88" rotor. This kit delivers a true big brake upgrade for the rear of custom builds, high-performance street machines, and show cars that require a reliable, cable-free parking brake solution.

At the heart of this kit is the FNSL4R four-piston forged caliper paired with high-performance BP-10 compound brake pads, engineered to deliver optimized, balanced braking force that complements front big brake upgrades. The integrated Electronic Parking Brake (EPB) caliper provides high-torque static holding power for secure parking without the need for traditional mechanical cables or hardware.

Key Features:

• Forged Narrow Superlite 4R (FNSL4R) four-piston rear calipers
• 12.88" two-piece vented rotor for superior heat dissipation
• 6-lug hub configuration for proper fitment on target axles
• Electronic Parking Brake (EPB) eliminates mechanical cable routing
• Includes control unit and complete wiring harness assembly for simplified installation
• High-performance BP-10 brake pad compound included
• Designed to complement Wilwood front big brake upgrade kits
• Suitable for custom, show, and high-performance street applications

The included control unit and wiring harness assembly streamlines installation and operation, making this one of the most complete bolt-in EPB solutions available for classic muscle car rear axles. Wilwood's Forged Narrow Superlite architecture keeps the caliper compact and lightweight while maintaining the clamping force required for serious performance use.