Rugged Ridge OMI-18465.10 | Rear Shock Absorber; 87-16 Jeep Wrangler YJ/JKORV only uses nitrogen charged gas shocks for all their kits. Though a little more money, the nitro gas shock in combination with the ORV kits provide a better ride both on and off road. By using an ORV lift kit and matching gas shocks, you optimize the suspension's capabilities giving you a better ride both on and off road. 150 PSI pressurized Nitrogen gas Internal valves the internal orifice will rotate when the piston moves more than 2 inch