Wilwood 140-14837-D FNSL6R Big Brake Front Hub Kit 12.88" Drilled Rotor

The Wilwood Forged Narrow Superlite 6R (FNSL6R) Big Brake Front Hub Kit delivers championship-level stopping power in a complete, bolt-on package. Built around a 12.88" drilled iron rotor and a forged six-piston caliper, this kit is engineered for traditional OEM spindles on American trucks and is designed exclusively for 17" and larger wheels.

Key Features:

• Forged Narrow Superlite 6R (FNSL6R) Six-Piston Caliper — stress-flow forged from premium billet for superior strength and a high-detail appearance
• 12.88" Drilled Vented Iron Rotor — cross-drilled pattern reduces pad glaze, dissipates surface heat, and minimizes irregular pad buildup for consistent performance
• Hub Kit Configuration — complete hub assembly engineered for direct fitment to traditional non-ABS OEM spindle applications
• 17" and Larger Wheel Clearance — sized to complement modern wheel, tire, and suspension upgrades
• Premium Long-Grain Carbon Iron Rotors — manufactured for high thermal stability, long wear life, and resistance to distortion under repeated heavy braking
• Ideal for custom show vehicles, high-performance street machines, and dual-purpose street/track builds
• Available caliper finish: Drilled rotor with standard caliper finish (see suffix key for full finish options)

The FNSL6R hub kit is a purpose-built big brake upgrade for American trucks running traditional OEM spindles. The six-piston forged caliper paired with the 12.88" drilled rotor provides a dramatic improvement in braking power and heat management over factory drum or small-rotor disc setups. The drilled rotor design adds the high-tech aesthetic demanded by custom and show builds while delivering real-world performance benefits on the street or track.