Wilwood 140-18252 FNSL6R Front Big Brake Kit for Nissan Skyline 1995-1998 12.88in Rotor

The Wilwood 140-18252 is an application-specific front big brake kit engineered for the 1995–1998 Nissan Skyline (R33), built around Wilwood's Forged Narrow Superlite 6R (FNSL6R) six-piston caliper. This complete bolt-on upgrade dramatically increases front braking capacity for high-performance street and track applications.

At the heart of this kit is the FNSL6R forged aluminum six-piston caliper — a lightweight, high-strength unit designed using modern FEA (Finite Element Analysis) body construction for maximum structural rigidity with reduced mass. The six-piston configuration ensures even clamping force distribution across the full pad face for consistent pedal feel and minimized uneven pad wear.

The kit includes a 12.88-inch vented rotor measuring 1.25 inches wide, delivering significantly more thermal mass than factory rotors to absorb and dissipate heat during repeated hard braking. Rotor surface options include E-coated GTB slotted rotors paired with BP-20 high-performance brake pads, or SRP drilled-and-slotted rotors paired with BP-10 street performance pads.

Key Features:

• Forged Narrow Superlite 6R (FNSL6R) forged aluminum six-piston caliper
• FEA-optimized caliper body for increased strength and deflection resistance
• 12.88-inch vented rotor, 1.25 inches wide
• Full compatibility with OE master cylinder, ABS, and electronic controls
• Application-specific engineering for simplified bolt-on installation
• Available in gloss red or gloss black powder coat finish (other colors available at additional charge)
• Premium-grade installation hardware included
• Optional bias-matched rear kit using Superlite FNSL4R four-piston caliper available separately

Wilwood's FNSL6R big brake kits are an ideal upgrade for track-prepared and high-performance street Skylines where increased brake capacity and upgraded style are required. Compatible with OE electronic controls and ABS systems. Stainless steel Flexlines are available separately for a complete brake line upgrade.