Wilwood 140-18366-D Forged Narrow Superlite 6R Front Big Brake Kit Mustang II Roadster Shop RSF-2 12.88" SRP Rotor

The Wilwood 140-18366-D is a complete front big brake kit featuring the Forged Narrow Superlite 6R (FNSL6R) six-piston caliper, purpose-engineered for Mustang II-style suspension builds using the Roadster Shop RSF-2 forged spindle. This kit is fully compatible with Roadster Shop SPEC and REVO RS chassis platforms, providing a truly bolt-on big brake solution for high-performance street and custom builds.

Key Features:

• Forged Narrow Superlite 6R (FNSL6R) six-piston calipers — deliver powerful, consistent clamping force with increased piston volume for strong braking with reduced pedal effort
• 12.88" vented iron rotor in SRP (drilled and slotted) finish — enhances heat dissipation, cooling efficiency, and overall rotor durability
• Lightweight two-piece aluminum hat design — reduces unsprung weight while maintaining structural rigidity
• BP-10 series street performance brake pads — engineered for quick response, fade resistance, and extended pad life under demanding street conditions
• Designed for Roadster Shop RSF-2 forged spindles — precise application-specific fitment for SPEC and REVO RS chassis
• Requires 17" or larger wheels for proper caliper clearance
• Multiple caliper finish colors and rotor styles available; track-only upgrades available by custom order

The FNSL6R caliper series combines race-proven stopping power with modern aesthetics, making the Wilwood 140-18366-D an ideal upgrade for custom builders and pro-touring enthusiasts who demand both performance and style from their front brake system.