According to Bilstein, most spacer leveling kits are inferior to their new 5100 Series adjustable leveling shocks. Designed for truck and SUV applications, Bilstein’s 5100’s are meant to raise up the front end while avoiding the compromises that come with using spacer kits. Bilstein claims their kits offer 2 inches more of suspension up-travel while increasing ride height as much as 2.75″, without increasing coilover assembly length.
While we haven’t installed a set of these shocks on a truck yet, we have reviewed Bilstein’s literature and we have some notes for anyone considering buying this kit. First, however, before you can recognize the difference between Bilstein’s new adjustable height leveling kit and similar kits from ReadyLift, Truxxx, Low Range Off-Road, or Toytec, you’ve got to know a little bit about suspension lifts in general.