I have tein s-tech springs w/18's . Did the alignment and resurfacing of the rotors. Ever since i got this car (3months ago) it has always shaked badly at 60mph then simmers down gradually when i hit 70-80 then 90 again there it is. Thought it was the wheel weights on the old rims so i got new ones and still this happens. Anyone have some suggestions? Also have kyb gr-2 struts on my ride. Really appreciate any advice or suggestions.