Wilwood 140-18076-DR Forged Narrow Superlite Rear Brake Kit Slotted Rotor - 4R 13.5

The Wilwood 140-18076-DR Forged Narrow Superlite 4R Big Brake rear kit is engineered specifically for 2020-2021 Jeep Gladiator JT applications, designed for road race competition and heavy-duty vehicles. This complete rear brake kit features slotted 13.50-inch rotors with black calipers and includes brake lines.

Advanced Caliper Technology:

• FNSL4R/ST calipers feature a forged aluminum body with Type III Mil-Spec medium gray hard anodized finish for superior wear resistance
• Thermlock pistons reduce heat transfer from pads to increase fade resistance and extend service life
• Internal damper springs and high-temperature piston seals ensure consistent pedal height
• Caliper piston volumes matched for full compatibility with OE master cylinder output and ABS controls

High-Performance Rotors:

• Spec 37 alloy GT Series directional vane 13-inch rotors dynamically mounted using Wilwood Dynamic Lug Mounting system to forged aluminum hats
• 5 x 5.00 inch (5 x 127mm) bolt pattern
• Slotted rotor design for improved heat dissipation and wet weather performance

This rear brake kit is the engineered match for AERO6R/ST front race kits, with emphasis on front-to-rear balance, high durability, and efficient heat management without adding unnecessary rotating or unsprung weight. The kit includes stainless steel brake lines for direct installation.