The Old Man Emu engineers’ objective was to develop a complete suspension system for the new Jeep Wrangler JL, suiting both 2-door and 4-door variants. Comprehensive research and vehicle testing along with countless hours of engineering resources were dedicated to the development of Old Man Emu suspension for the JL. Old Man Emu is proud to offer an integrated 3.5 inch system (2.5 inch for Rubicon) that easily bolts on and provides excellent control off-road. The Jeep Wrangler JL suspension has been developed as a complete suspension system to ensure alignment can be returned to factory specifications.tional Old Man Emu fitment style. Please refer to the application guide for part numbers and fitting notes.