The Zero-2 suspension kit shares all the same components as the Zero-1 kit, but adds 5 levels of dampening. For the more performance oriented consumer, the adjustable dampening allows greater tuning of the suspension. The kit includes upper perch, dust cover, bump stop, shock, spring, and spanner wrenches. Installation is straightforward and bolts on using normal hand tools. MUST USE INTEGRA TYPE R REAR LOWER CONTROL ARMS