Wilwood 140-13866-R Superlite Rear Big Brake Kit Red for 12-19 Ford F-150 6-Lug

Vehicle Fitment

• 2012-2019 Ford F-150 (6-Lug) with Manual Parking Brake – All Trims

Fitment Notes

• Rear axle position only; sold as a complete kit
• Requires vehicles equipped with MANUAL parking brake; NOT compatible with electronic parking brake systems
• 6-lug wheel bolt pattern models only
• Requires minimum 18" diameter wheels; verify clearance using Wilwood's wheel clearance diagram in installation instructions before purchase
• Brake line kit required and sold separately (Wilwood 220-15277 and 220-15276)
• Retains full use of OE parking brake, master cylinder output, and ABS functions
• Compatible trims include: XL, XLT, STX, FX2, FX4, Lariat, King Ranch, Platinum, Limited, SSV, Harley-Davidson Edition, and Raptor

Features

• Forged Narrow Superlite 6R (FNSL6R) six-piston calipers with radial mount design for precise rotor alignment
• Staggered piston bore configuration (1.62"/1.12"/1.12") optimizes pad wear and reduces taper
• 14.25" diameter GT slotted two-piece rotors provide massive braking surface area
• BP-10 Smart Pad compound delivers medium-high friction with low noise and minimal dust
• Forged billet aluminum caliper bodies reduce unsprung weight while maximizing rigidity
• Red powder coat caliper finish with embossed Wilwood logo for show-quality appearance
• Internal fluid crossover ports eliminate external transfer tubes for cleaner installation
• High-temperature square-ring seals and stainless steel pistons resist corrosion and fade
• Designed for compatibility with OE master cylinder output and ABS system
• Complements 14.25" and larger front brake upgrades for balanced braking performance
• Fully serviceable design with replaceable pads, seals, and hardware
• Engineered and manufactured in the USA by Wilwood Engineering

Specifications

• Part Number: 140-13866-R
• Position: Rear
• Caliper Type: Forged Narrow Superlite 6R (FNSL6R)
• Caliper Finish: Red Powder Coat
• Mount Type: Radial
• Number of Pistons: 6 (per caliper)
• Piston Bore Sizes: 1.62" / 1.12" / 1.12"
• Rotor Diameter: 14.25 inches
• Rotor Style: GT Slotted
• Brake Pad Compound: BP-10
• Brake Pad Plate: 7416
• Brake Pad Area: 8.2 sq. in.
• BP-10 Peak Operating Temperature: 900°F
• BP-10 Peak Friction Coefficient: 0.46
• Minimum Wheel Diameter: 18 inches
• Axle Offset: 0

Included Components

• Forged Narrow Superlite 6R calipers with red powder coat finish (pair)
• 14.25" GT slotted two-piece rotors (pair)
• BP-10 compound brake pads (set)
• Radial mount caliper brackets
• Parking brake integration components
• All necessary mounting hardware
• Installation instructions with wheel clearance diagram

Product Description

The Wilwood 140-13866-R Forged Narrow Superlite 6R Big Brake Rear Kit delivers race-proven braking technology for 2012-2020 Ford F-150 owners seeking enhanced stopping power for towing, hauling, and performance driving applications. This bolt-on kit combines six-piston forged aluminum calipers with 14.25" GT slotted rotors to dramatically increase rear brake capacity while retaining full compatibility with your truck's factory parking brake, master cylinder, and ABS system.

The heart of this system is Wilwood's acclaimed FNSL6R caliper featuring a staggered piston bore configuration (1.62"/1.12"/1.12") that equalizes pad wear and maximizes clamping force across the entire pad surface. The radial mount design provides two planes of adjustment for precise caliper-to-rotor alignment, while internal fluid crossover ports eliminate external transfer tubes for a cleaner, more reliable installation. The BP-10 Smart Pad compound is engineered specifically for truck applications, delivering the medium-high friction characteristics of a semi-metallic race compound with the quiet engagement, low dust, and positive low-temperature response expected of a street performance pad.

Finished in eye-catching red powder coat with embossed Wilwood logos, this rear kit provides the perfect complement to Wilwood's 14.25" and larger front brake upgrades when building a complete high-performance braking system for your F-150. The kit integrates seamlessly with wheel, tire, and suspension upgrades on show trucks, tow rigs, and high-performance street/track builds. Note that 18" or larger wheels are required and brake lines must be purchased separately. Wilwood Engineering has been designing and manufacturing high-performance brake systems in Camarillo, California since 1977.