Wilwood Forged Narrow Superlite 4R Big Brake Rear Brake kit for OE Parking Brake 2020-2021 Jeep JT

Wilwood has engineered a new rear big brake kit to accompany its popular front Aero6-DM brake kits for Jeep Wranglers (JK 2007-18, JL 2018-21) and Gladiators (JT 2020-21). Upgrade the factory floating calipers with rigid forged aluminum Superlite calipers and larger 13.50” premium alloy rotors for improved performance, pedal feel, and better thermal capacity.

These rear kits were designed to be compatible with factory master cylinders, ABS where used, OE or Wilwood front brake kits, and will fit most 17” or larger wheels. The 13.50” Superlite FNSL four piston rear kits provide more holding power and greater brake torque for all types of Jeep driving, including highway, off-road, towing, hauling, and other high-demand applications.

Kits include BP-20 dual sport performance brake pads, 13.50” x .81” premium-grade iron alloy rotors with 36 vanes for proper cooling, plus a lightweight aluminum hat. Engineered to mount onto the factory rear axle flange and retain full use of the original parking brake. Currently available with E-coated GTB slotted rotors that minimize dirt and debris accumulation, or an SRP drilled and slotted version to be available Fall 2025. Calipers are available in gloss red or black powder coat with 26 surcharge color options available. Stainless steel braided Flexline kits and premium-grade hardware included. (Note: dust shield modification is required for proper fitment). 

*This Brake Kit may fit 18-inch wheels. Please refer to the wheel clearance diagram to check to see if it will fit your specific wheel. Wheel Clearance Diagram