This kit includes front and rear spacers. On the front you will need an 18mm spanner or socket set. It is used to loosen the stabilizer bar and lower shock mount. I did this with jack stands, a small jack and a factory scissor jack. The tires will naturally detach, make sure you detach (DO NOT disconnect) the ABS line from the bracket. Note the bolt and the direction it goes for the stabilizer bar and lower shock mount. The lower front spring seat has room to stop the spool. The instructions say to put it on top of the insulation. Actually I did the opposite for the front and back. So far no problems. For the rear, same tools plus a 10mm nut/socket to unscrew the rear brake hose from the side rail bracket above the rear wheel. (If you don't unscrew it when you drop the axle, it will stretch if it doesn't break the wire!) There's also a small compression clamp that holds some of the wires, which I unhooked to keep the wires from becoming too tight burden . My breather tube came loose when I lowered the axles so keep that in mind. When bolting the rear components, it is easier to install the lower rear anti-roll bar bolts in front of the rear shock. Don't forget to secure the brake line and push pin for the wires.