Wilwood 140-18243-D Forged Narrow Superlite 6R Front Big Brake Kit 12.88in Drilled/Slotted

The Wilwood 140-18243-D is a front big brake kit built around the Forged Narrow Superlite 6R (FNSL6R) six-piston caliper, delivering race-proven stopping power for the Nissan 240SX (1989–1998) and Skyline platforms. This kit is engineered as a direct bolt-on application, ensuring simplified installation with full compatibility with the OE master cylinder output and ABS systems where equipped.

At the heart of this kit are forged aluminum 6-piston calipers that provide exceptional strength at reduced weight compared to factory cast iron units. The six-piston design uses three pistons per side for even pad pressure distribution and superior clamping force across the full pad face.

Key Features:

• Forged Narrow Superlite 6R caliper — forged aluminum construction for high strength-to-weight ratio
• 12.88-inch (327mm) drilled and slotted rotors — significantly larger braking surface than OEM for increased heat capacity and stopping power
• Drilled and slotted rotor design — promotes rapid heat dissipation and outgassing to resist brake fade under repeated hard stops
• Application-specific engineering — designed for direct bolt-on installation with no OE system modifications required
• ABS compatible — maintains full compatibility with factory anti-lock brake systems where equipped
• Reduced unsprung weight — lightweight forged aluminum calipers improve suspension response and handling feel
• Multiple finish and rotor options available — choose caliper color and rotor style to match your build

This big brake kit is an ideal upgrade for high-performance street builds, show cars, and track machines where wheel, tire, and suspension upgrades demand a braking system that can keep pace. The FNSL6R platform is backed by Wilwood's decades of motorsport engineering, designed and manufactured in the USA.