I fitted this kit to my 2007 Toyota X-Runner to reduce rear sag when towing a boat or loading heavy items onto a truck. I connected this system to an Airlift 72000 wireless compressor system. Everything is working fine! The reason for 4 and not 5 stars is because the truck is about 1/2 to 1 inch larger with the required 5psi pressure in the pockets. But it runs best at 7-10 psi (no load), which allows the truck to sit even higher. Since the X-Runner is a sport truck, I was hoping it would be stock level with the 5psi minimum pressure requirement. I don't feel road noise or procrastination like the other reviewer.