Wilwood 140-18155 Front Big Brake Kit FNSL6R 12.88" Rotor 6-Lug Truck

The Wilwood 140-18155 is a front big brake kit built around the Forged Narrow Superlite 6R (FNSL6R) six-piston caliper and a 12.88-inch diameter rotor, engineered specifically for 6-lug truck applications. This kit delivers a substantial upgrade in braking capacity over factory drum or disc brake systems, making it an ideal choice for trucks that have received wheel, tire, or suspension upgrades.

Wilwood engineers this kit application-specific, meaning all components are precision-matched for a straightforward installation process. The kit is designed to maintain full compatibility with the OE master cylinder output and ABS systems where equipped, so no additional hydraulic modifications are required.

Key Features:

• Forged Narrow Superlite 6R (FNSL6R) six-piston calipers for maximum clamping force and fade resistance
• 12.88-inch diameter rotor for increased thermal mass and improved heat dissipation
• 6-lug hub configuration engineered for truck applications
• Application-specific engineering for simplified, bolt-on installation
• Compatible with OE master cylinder output and ABS functions where applicable
• Available in optional caliper finishes and rotor designs to match your build style
• Complements wheel, tire, and suspension upgrades with increased stopping power and visual impact

The FNSL6R caliper's forged billet aluminum body provides exceptional rigidity and heat management, while the large 12.88-inch rotor surface area ensures consistent, confident braking under demanding conditions. Optional rotor drilling and slotting patterns are available to further tune braking feel and rotor cooling.