Wilwood 140-18243-R Front Forged Narrow Superlite 6R Big Brake Kit for Nissan 240SX / Skyline

The Wilwood 140-18243-R is an application-specific front big brake kit built around the renowned Forged Narrow Superlite 6R (FNSL6R) six-piston caliper. Engineered for the Nissan 240SX (1989–1998) and compatible Skyline platforms, this kit delivers a dramatic upgrade in braking capacity while maintaining full compatibility with the factory master cylinder output and OEM ABS systems where equipped.

This kit is purpose-built to complement wheel, tire, and suspension upgrades commonly found on high-performance street builds, track-day machines, and show cars. The FNSL6R caliper's forged aluminum construction keeps unsprung weight low while providing the rigidity and clamping force needed for aggressive driving conditions. Big rotor sizing — available in 13" to 14" configurations — increases thermal mass and swept area, reducing fade and improving overall stopping consistency under repeated hard stops.

Key Features:

• Forged Narrow Superlite 6R caliper — six-piston monoblock design for maximum stiffness and pedal feel
• Application-specific engineering — direct-fit installation with no custom fabrication required
• OE master cylinder compatible — maintains proper hydraulic balance without a brake proportioning valve upgrade
• ABS compatible — retains factory ABS function where originally equipped
• Big rotor upgrade — 13"–14" rotor sizing increases thermal capacity and fade resistance
• Street and track capable — suited for high-performance street driving, autocross, and road course use
• Optional caliper finishes and rotor designs — personalize appearance to match your build

The Wilwood FNSL6R Front Big Brake Kit is the ideal solution for Nissan 240SX and Skyline owners seeking serious braking performance that pairs seamlessly with popular chassis and suspension modifications. This is a right-side (R) front caliper kit.