I heard that I need a cage to be a professional drifter.

..seriously, I purchased the cage to stiffen the car, and it made a hell of a difference. I could feel my car twist in turns 17 and 1 at Sebring. Now, I feel very little movement. I am going to buy the additonal pieces to make it a 10 point and weld gussets to the A pillars. An added benefit is my car is safer when I am on the track.