Wilwood 140-14578 Forged Narrow Superlite 6R Front Big Brake Kit 14in Slotted Rotors with Lines

The Wilwood 140-14578 Forged Narrow Superlite 6R (FNSL6R) Front Big Brake Kit is a bolt-on performance brake upgrade featuring a 14-inch slotted rotor and race-derived six-piston caliper technology. Engineered as a direct-fit application-specific kit, it maintains full compatibility with the OE master cylinder and ABS systems, making it an ideal upgrade for high-performance street and off-road builds.

At the heart of this big brake kit is the Forged Narrow Superlite 6R caliper — a fully CNC-machined billet aluminum body with closed-end bridges and a reinforced bridge-to-body transition. Center bridge body bolts deliver additional rigidity and positive pad retention, resulting in an ultra-stiff structure that resists separation and deflection under high braking loads. A race-proven differential bore, six-piston configuration generates high clamping force with balanced pad loading, while staggered piston sizing compensates for temperature, load, and wear-rate variances across the pad face.

Key Features:

• 14-inch vented, slotted iron rotors — significantly larger than stock for improved cooling and stopping power
• Slots reduce pad glaze, dissipate surface heat, and minimize irregular pad deposits for consistent pedal feel
• Stainless steel pistons — low heat transfer properties with excellent corrosion resistance
• Direct-fit design engineered for simplified installation with common hand tools
• Full OE master cylinder output and ABS compatibility where applicable
• High-luster black anodized caliper finish for a premium appearance behind the wheel
• Brake lines and flex fittings included for a complete installation
• Bolt pattern: 6×5.5 | Spindle type: Factory disc spindle

This kit is purpose-built to complement wheel, tire, and suspension upgrades on performance street and off-road vehicles, delivering a meaningful increase in braking capacity alongside a distinctive, custom look.