The Bilstein 6100 Mini Magnum shock is by far the most proven shock in off-road racing history. It has been a staple for off-road buggy and car builders for years. The patented valving technology in the Bilstein has never been replicated or matched by any other manufacturer to date. It senses varying terrain with ease (We like to call it a smart shock). Bilstein was the first to completely separate the Nitrogen gas and oil making for the most consistent and coolest running shock on the market. Bilstein has the reputation of only using the finest raw materials in their shocks and they are built right here in the U.S. They are factory rebuildable and can be revalved if needed. We have set this package for overall performance for the XP900 (2 Seater). The shocks are valved to our specs and work for your typical set up with an aftermarket cage, doors or side panels, front and rear bumpers, and 350 to 450lbs of passenger and accessory weight.