I have a 2003 Z4 3.0 with the sports suspension. From what I know, the sports suspension is 0.6 inches lower than the regular suspension. Here in Islamabad, the roads are not suited for this low a suspension, as the car gets scrapped from the bottom a lot. Also on higher speeds, due to the firm suspension combined with the bumpy roads, its hard to keep the car in a straight line. I'm even scared to drive it too fast, as I dont find it stable (Please note that this is my first roadster, and i'm shifting from an e60 530). Will putting the regular car's springs(one without sports suspension) help resolve both these issues. What will be the negative side affects?