I've read a lot of threads on lowering the 458. The piece of information I can't find is, what are the spring rates for the OEM Springs F/R, how about the Specialie?. What are the rates of the Novitec Springs. Why can't I just measure the spring length, diameter, figure out what the stock rates are, buy some eibach ERS/hyperco whichever springs and put them on. The Novitec setup is essentially a linear race spring with a helper spring unless the OEM springs are an unusual diameter. To OP. Every USA car has different heights, so lowering is relative to what the start was. My car was higher than other US 458s I've seen. Mind is dropped 1.5" front and 1" back and it rides fine...if anything better than before.