Rancho sport suspension system 

Rancho has released an innovated sport suspension system for Jeep Wrangler JL 3.6L V6 Unlimited Series using new dynamic rebound spring (DRS) technology.  The kit features an internal system that includes a tuned metal spring and fortified interior construction, pair of front and rear RS5000X shocks, pair of corner-specific progressive rate coil springs, and coil springs to ensure a level stance and ride. The system also has front and rear 2-inch bump stop extensions, front sway bar adapter brackets, rear extended sway bar end links, and an emergency brake line relocation bracket. 

Rancho  

http://www.gorancho.com/