Well i put the Diff in my car and to be honest, its not improved the handling at all. Whenever i go around a hard corner it rolls across the footwell and hits the passenger door wing. Ive tried it in the back of the car but it hits the spare wheel. The noise it makes is quite deafening and it scares me it might damage the inside of my car. What if i crash, it might come flying and hit me. Maybe it just makes you a safer driver having a diff in your car. But front or back makes no noticable difference to the handling. Even tried it in the center behind the drivers seat with no success.