Are you a friend of CrazyRussian? ha.

depending on how low you lower the car, a camber kit is suggested. less than 2 inches, you should be fine. more than 2, I'd suggest a camber kit. it's not necessary though, you can survive without one, but you'll be replacing your tires more often. depending on the spring rate and type of shocks you get will determine how much you "bounce". I don't bounce with my suspension, I hit a bump and I can feel it, but I don't go up and down for 2 miles after I hit the bump like people with cut springs.