03. With the k-frame in place, two bolts are mounted through the coil over mount and the frame rail. The purpose of these bolts is to firmly hold the tower against the frame. No two cars are the same, and a means was needed to make up for irregularities in factory frame rails. When the car is in use, the forces on the shock tower hold it against the frame rail; they don’t pull it away, so it’s merely added security, not a structural necessity.