"Tri-Lock" piston rod seals lock gas and oil in while outer seal keeps dirt and debris out. GSP's Silent Ride Technology (SRT) encompasses premium isolator bushings and application specific upper mounts to eliminate unwanted vibration and noise. Dual-layered, chrome finished piston rods provide superior corrosion resistance for maximum seal life in extreme environments. Engineered with proprietary oil that retains viscosity through a wide temperature range for performance and foam resistance. Nitrogen gas charged loaded struts help reduce oil foaming and strut fade, while providing a consistent ride experience. Coil springs are designed and tuned specifically for each application to restore the vehicle ride to original factory specifications for optimal performance, control, and ride height.