Installed an Air Lift 1000 kit on my 2002 Pathfinder that had a lot of sagging rear spring. Replacement springs were ridiculously expensive, and these airbags were less than half the price. With just two adults and a full tank, it only takes 30% of the maximum rated pressure to get her croup up and proud again. Interesting, I always knew mine needed some attention, but it took other similarly unfortunate Boy Scouts seen on the street to persuade me into action. Installation was easy for me (after a little workaround). This is because the 2002 model has spring seats with a lower center hole, which forced me to do a similar install to some others (without drilling it into a larger hole). All was going well until a week later, after a sudden short puff of air, the flaw in the method became apparent. I was putting the truck back on the lift for another job when the polyethylene tubing supplying air to the chambers broke off one of them. On closer inspection, it turned out that the cylinders take a kind of stranglehold after commissioning (filling with air) due to their individual springs. So when the truck was jacked up, the rear axle would lengthen until it was hanging on the shock absorbers, allowing the springs to stretch and then allowing the air chambers to expand alarmingly far beyond their lower spring saddles. To do this, they have to pull their polyethylene air supply hoses up through the holes in the seats. In this case, the original small hole was tight enough on the polyethylene tubing to restrict its smooth passage, thus forcing it out of the brass nipple protruding from the bottom of the bladder. In addition, when the car was lowered back onto the suspension, the pipe did not return to the small holes, but was like an accordion (pinched) to the point of being unusable. (I tried this as an experiment). With my newfound knowledge, I decided to reinstall following the manufacturer's instructions, including removing the springs, drilling at least 5/8" holes, smoothing out any burrs, and reassembling with the extra hose, which was sufficient folded under the spring seats to allow the cylinders to be raised and lowered (through the body frame) as in a workshop when lifting the vehicle. Handling is excellent, even when heavily loaded with four adults and vacation gear plus a trailer. , still only required to increase the pressure to 50% of the maximum. A wonderful product to be sure.