If you are thinking of lowering your car up to 2 inches you should be able to get away without needing camber kit. If you lower it over 2 inches than most likely you will need the camber kit for front and rear. Don't forget that once you align your wheels at desired height, even though you have adjustable coilovers, everytime you mess around with the height of your car you'll mess up you wheel alignment or your camber setting.