well, its all up to the person and the setup. if u go no more than 1.5" like the eibach pro-kit, then u dont need one. But if u go on low coilovers of race springs like neuspeed ones then u do "need" a camber kit to correct the negative camber. I would strongly advise getting a camber kit if u go lower than 1.5-1.75 due to quick tire wear and off alignment. Also looks a lot more professional if your tires arent noticeably slanting inwards.