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

The Wilwood 140-18366-R is a Forged Narrow Superlite 6R (FNSL6R) front big brake kit purpose-built for Mustang II-based chassis using the Roadster Shop SPEC or REVO RS platform with the RFS-2 forged spindle. This red powder-coated kit delivers serious stopping power with a refined, show-quality appearance designed for high-performance street and track builds requiring 17" or larger wheels.

Key Features:

• Forged Narrow Superlite 6R (FNSL6R) six-piston calipers — billet forged construction in red powder coat finish
• 12.88" vented iron rotor with 48-vane design for superior heat dissipation and fade resistance
• Lightweight two-piece aluminum hat for reduced unsprung weight
• Radial caliper mount with stainless steel pistons
• 6 pistons per caliper — increased piston volume (4.04 in²) delivers stronger clamping force with reduced pedal effort
• BP-10 series brake pads — street performance compound with quick response, fade resistance, and extended pad life (Pad Plate: 7416, Pad Area: 8.2 in², Pad Volume: 3.8 in²)
• Designed specifically for the Roadster Shop RFS-2 forged spindle used on SPEC and REVO RS chassis
• Optional caliper colors and rotor styles available by custom order

The FNSL6R caliper's narrow profile is engineered to clear tight wheel applications while maximizing pad area and piston volume. The thicker 48-vane vented rotor improves thermal capacity compared to standard rotors, making this kit an ideal upgrade for custom builds, pro-touring machines, and high-performance street/track dual-purpose vehicles. Sold as a complete front axle kit.