This Frontier specific kit uses our new aluminum fully adjustable coilovers that are assmebled and ready to install. This kit also uses the SPC upper a-arms, our Deaver single add-a-leaf that replaces the overload leaf and Bilstein 5125 series rear shocks. Max lift in the front is 3" but can go taller if you dont mind a little loss in ride quality. The rear is about 1.5-2" lift and will yeild a level stance. This is simply the best riding kit we currently offer for the Frontier. you will see a 25% increase in wheel travel for better bump absorption as well as much better traction offroad. These coilovers are avaible in 500-650lb rates also and come with a very nice spanner wrench. Note, do not run spacers on top of these shocks,....these are currently the longest coilovers made for this combo and have to be used specifically with the SPC arms or coilbucket contact will occure. Also, no need to run shims on the Frontier, other shops will sell them to you but they are 100% not needed on this platform. We try to stock all of these items, but the coilovers can take a week or so to assemble and the SPC arms will typically drop ship straight to you.