I bought mine at home depot I only got washers but depends on how bad your camber is and how many washer you put on you might have to get new bolts.
parts
1 - Washers, use 3/8 galvanized washers (from Home Depot). For the Eibach Pro-Kit (1.3") drop, I used 2 washers on each bolt. And you got 4 bolts, hence you will need a total of 8 washers.
2 - you might need new bolts if you put more than 2 washers. If that is the case, use M10 x 45mm bolts. Home Depot has them, Four fine thread machine screws (M10 x 1.25 45mm bolts), (Home Depot part #18531). The are cheap, so pick your bolts of varied lenght (any from 30mm to 45 mm is fine), and if you don't need them, just return them.
3. Tools (14mm socket and ratchet)
Procedures
1. Jack up the corner of the car that you are working on. Use stands if you have them, I definately recommend fixed stands to put under the car. Make it a must. Safty first!!
2. Take of the wheel.
3. See the 2 M10 bolts holding the Rear control arm, I will refer to them as bolt1 and bolt2, in no particular order.
4. Unscrew bolt1 out. You will need so force to loosen the screws. This is where handy tools come in if you have them.
5. LOOSE bolt2 only, just enough so you can slide the washers into the bolt1. Once the washers are in, screw bolt1 back in. In enough that it wouldn't come out. Don't tighten it all the way as you will need to put washers on bolt2 now.
6. Unscrew bolt2, and put the washers in.
7. Tighten both bolts, and you are Done.
8. Do the other wheel. and I hope you enjoy your cheap, but effective rear chamber fix.
And that should do it.