The car originally came with some Racing Beat Springs and are very, very low. Too low infact. Both of the front fenders of the Mazda RX-7 have creases in them because of the wheels hitting the fender. I had Racing Beat Springs in My Turbo II and didn't like them in there too. Although Racing Beat offers excellent parts, I would not recommend Racing Beat spings to anyone.
In Racing Beat's defense I do still have stock shocks and 18 inch wheels. This may have added more to the problem. After getting a series of alignments from a Local Road Race shop that specializes in RX-7's, the car handles like a champ.