Skyjacker builds such high quality suspensions components that many believe their pieces to be the standard of the 4x4 industry. Every Skyjacker Suspension kit receives countless hours of research and development so they will work in form and function to the highest level of performance possible with the highest quality of materials and resources available. Then, even more time is spent in field testing performance and checking for clearances and possible weak links so you have no doubt that you are getting a proven suspension system that will be performing to the highest level for many years to come. Skyjacker kits are designed, for the majority, to be bolt-on systems that do not require major chassis modifications. Some of the higher lift kits will probably require some cutting of factory brackets so new heavy-duty designed pieces can take their place and some of those new brackets may require a little bit of welding. While some kits are as simple as just front and rear springs others may include items such as new spindle mounts/steering knuckles, drop bracketry, heavy-duty crossmembers and longer control arms but that all part of the game when you wanna go BIG. Shocks sold separately