Wilwood 140-18076 Forged Narrow Superlite 4R Rear Disc Brake Kit 13.50in Slotted Rotor

The Wilwood 140-18076 Forged Narrow Superlite 4R rear disc brake kit delivers championship-proven braking performance for 2020-2021 Jeep Gladiator JT applications. This complete big brake system features four-piston forged aluminum calipers paired with 13.50-inch slotted GT Series rotors, providing significant braking capacity upgrades while maintaining full compatibility with OE master cylinders and ABS systems.

Advanced Caliper Technology:

• Forged aluminum FNSL4R/ST four-piston calipers with Type III Mil-Spec hard anodized finish in medium gray
• Thermlock pistons reduce heat transfer to minimize brake fade and extend component service life
• Internal damper springs and high-temperature seals ensure consistent pedal feel
• Piston volumes precisely matched for OE master cylinder compatibility
• Radial mount design for superior caliper rigidity and performance

High-Performance Rotor Assembly:

• 13.50-inch Spec 37 alloy GT Series directional vane rotors with slotted design
• Dynamic Lug Mounting system using forged aluminum hats with hard anodized finish
• 5 x 5.00-inch bolt pattern for proper fitment
• Superior heat dissipation without adding unnecessary rotating weight

Complete Kit Includes:

• Forged Narrow Superlite 4R four-piston calipers with black finish
• BP-10 compound performance brake pads
• 13.50-inch slotted rotors with mounting hardware
• Stainless steel braided brake lines
• All necessary brackets and installation hardware

Engineered for optimal front-to-rear brake balance, this rear brake kit is designed to complement 13-inch and larger front brake upgrades. The system retains full use of the factory parking brake mechanism while providing enhanced stopping power for high-performance street, show, and dual-purpose applications. Compatible with both power-assisted and manual brake conversions using balance bar pedal assemblies with appropriately sized master cylinders.