The Eibach rear Pro-Alignment kit for the Civic Si is the ultimate in performance oriented alignment adjustment. These kits can correct negative camber caused from lowering your car and are an absolute must for anyone who is serious about handling. This kit gives more adjustment then the standard camber bolt kit which allows for the ability to dial in a custom performance alignment. A balanced alignment is necessary for a good handling car and you can do just that with the pro-alignment kit from Eibach. Whether it be a street/race application, this is a must have.