Wilwood 140-16681-R Forged Narrow Superlite Radial Front Disc Brake Kit

The Wilwood 140-16681-R is a complete front disc brake kit built around Wilwood's Forged Narrow Superlite 4R (FNSL4R) four-piston radial-mount caliper, engineered for high-performance street driving and competition use on import vehicles. The kit is a true bolt-on solution that mounts directly to the front strut without requiring additional brackets or adapters, making installation straightforward and clean.

Caliper: The FNSL4R caliper features a forged aluminum body with a narrow profile that maximizes wheel clearance while delivering exceptional clamping force through its four-piston radial design. The red anodized finish provides both corrosion resistance and aggressive styling.

Rotors: This kit includes 11.10" to 12.19" diameter HD or SRP series rotors that are drilled, slotted, and finished with an e-coat protective coating for improved durability and corrosion resistance. The combination of cross-drilling and slotting promotes rapid heat dissipation and helps evacuate gas and debris from the pad-to-rotor interface under hard braking.

Brake Pads: Wilwood's BP-10 compound Smart Pads are included, delivering the ideal balance of positive pedal response, long service life, high fade resistance, and easy wheel cleaning—well suited for both spirited street use and occasional track days.

Key Features:

• Forged Narrow Superlite 4R (FNSL4R) four-piston radial-mount calipers
• 11.10" to 12.19" diameter drilled and slotted e-coat HD or SRP series rotors
• BP-10 compound Smart Pads for fade resistance and long wear
• Direct bolt-on fitment to front strut — no additional brackets or adapters required
• Braided stainless steel flexible brake lines included
• Red anodized caliper finish for corrosion resistance and appearance
• Engineered for high-performance street and race applications on import vehicles

The Wilwood 140-16681-R front brake kit provides everything needed for a complete high-performance brake upgrade in a single package, delivering race-derived technology with the convenience of a direct-fit, street-ready installation.