That is 100% not true. I have a tubed K with tubular A arms, rod ends on all of the control arms, coilover on all 4 corners, and not a single piece of rubber in my suspension. My car rides very nice. So much better then stock. I use all adjustable shocks/struts so I can go from street setting to strip settings. The biggest plus is that my car does not rock at idle becuase of the huge cams.