I started to diassemble my front suspension to lower my cobalt and I cannot get the 2 lower bolt off of the shock tower. Its almost like they are threaded in to the shock tower and the head of the bolt is only flat on two sides and the res of the bolt is rounded. Anyone with a lowered ss that could help me out??? I can get a 15 mm wrench on it but cannot get enough torque to break it loose. Is there some type of special tool for this?