nothing to include, really. unless you don't have anything now, you reuse the lower nut[s] and washer[s], as this is a rubber bushing with no insert that slides on the spring plate, and the upper bushing has a steel insert for the 1/2" through bolt[s] that attaches the upper shock to the crossmember [which you also reuse]. those items are repopped, i believe, so if you need [or want] to replace them, they will be an extra expense. i can't think of any rear shocks sold that include the hardware, unlike front shocks.