These are a great option for building a proper titan swap Frontier or Xterra. These shocks use a 60mm (2,5") dia body that provides great damping potential and ride quality. We are only selling these assembled and the come with 600lb springs that are about perfect for people running aftermarket bumpers. These will ride great with a stock bumper but will feel a bit sporty...NOT harsh or bouncy, just nice and taught. Bilstein does not build a lot of these so there may be a wait to get them, but typically no longer than a set of regualr coilovers. Lift is the same as other coilover options designed for a titan swap...from 1-4" of lift. These shocks have a very large range of ride height sdjustment, but the springs need to be compressed to change the height. We typically set these for 4" of lift, if you want a custom height, just leave a note in the comment box when ordering.