You're better off without adjustable springs if you aren't going to use them for what they are meant for. If you lower around 1.5" you can get away without camber kits, any thing more that should get them. Camber isn't the only thing that changes when you lower a car. Toe will also change. Incorrect toe will wear out the whole tire unlike negative camber only wearing out the inside edge. Whether you choose camber kits or not after lowering you still need an alignment to fix the toe! A little negative camber is a good thing(if it's not tearing up the tires) Incorrect toe setting is a bad thing. That will eat your tires up and slow the car down.