I installed ride control airsprings by AIR LIFT in my truck 9 years and 65,000 miles ago to carry my bonneville across the back of the truck in a carrier. One of the air bags started leaking, so I contacted the company. They have a lifetime warranty and they are not kidding. They told me that they would send me a new airbag (retails as a replacement for about $80 or more). Then he confirmed that the set was 9 years old and told me that they would send me new ones for both sides at no charge and free shipping. Now, that is one great company.