Wilwood Rear Wrangler JL SRP Conversion (2018–2025) — Black Superlite, 13.50-Inch Rotors

This Wrangler JL rear package supplies black four-piston Superlite calipers over drilled/slotted 13.50-inch SRP rotors. Its fitment extends only to the listed JL trims and years, and installation includes modifying the factory dust shields. Wilwood Engineering’s disc brake systems and components serve motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977; it is based in Camarillo, California. Wilwood designs and manufactures brake rotors and calipers as well as master cylinders, valves, brake lines and fittings. Selecting compatible components is essential to the complete system.

Technical Details

• Manufacturer part number: 140-18075-D
• Rotor specification: Iron, SRP Drilled & Slotted, vented; 13.50 x 0.81 inches
• Caliper specification: 4-piston Forged Narrow Superlite 4R in Black Powder Coat; radial mount
• Included service pad compound: BP-22; Stainless pistons
• 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.

Check the complete application table below, including its model-year splits and configuration 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.

For fitment help, contact PMB Performance with your VIN and details of any axle, spindle or brake changes. Our team has over 20 years of experience checking parts and fitment, including the dimensions that a model-year search cannot establish.

Vehicle Applications

Application Notes

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