Wilwood Rear Black FNSL4R Brakes for Wrangler JL (2018–2025), 13.50-Inch GT & 25-Inch Hoses

Black FNSL4R calipers, BP-22 pads and 13.50-inch GT-slotted rotors form this Wrangler JL rear conversion. The included 25-inch hose kit serves the hydraulic brakes while the original parking-brake mechanism is retained. Founded in 1977 by Bill Wood and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components for motorsport, street-performance and specialized applications. Its range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines, selected to work together within a properly matched brake system.

Technical Details

• Manufacturer part number: 140-18075
• Service calipers: Forged Narrow Superlite 4R; 4 pistons; radial mount; Black Powder Coat
• Brake rotors: 13.50 x 0.81 inches; Iron; GT Slotted; vented construction
• Pads: BP-22; piston material: Stainless
• Caliper body material: Forged aluminum
• Hydraulic inlet: 1/8-27 NPT
• Rotor/hat wheel-stud clearance pattern(s): 5 x 5 in; 5 x 127 mm; match the installed hub/axle pattern
• Parking arrangement: retain the original parking-brake assembly
• Hydraulic brake hoses: included; DOT-approved hose kit
• Wheel clearance: 17-inch wheels may fit; verify the manufacturer’s complete caliper/rotor template for the installed wheel
• Supplied as one kit with mounting hardware; spindles, hubs, master cylinder and booster are not included

Fitment & Compatibility

Fits the listed Wrangler JL applications from 2018–2025, with trim-specific limits for Rubicon, 392, 4xe and other versions. Retain the factory parking-brake assembly and verify the exact model/trim row; the broad year range does not cover every JL configuration.

Follow DS1639 for the required dust-shield modification and caliper alignment. This JL package includes 25-inch brake hoses; check routing through full suspension travel after installation.

Use the fitment table below to confirm the exact year, model, trim and installation notes.

Manufacturer Resources

• Exact Wilwood kit specifications and wheel-clearance information
• Installation instructions and component list

WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.

PMB Performance brings over 20 years of experience with brake components and fitment details. Send us your VIN together with the installed axle, spindle, brake and wheel specifications if you need help confirming this package.

Vehicle Applications

Application Notes

1. Line kit included (manufacturer): 220-15929 (25.00 in)
2. Rear line-kit reference: 220-15929