Weirdly, it actually isn't that much rougher a ride. He used to be up the street from a railroad crossing, and before & after the install he'd specifically send people out to cross the tracks for a comparison. I've driven his GTS (which has the bushings in addition to stiffer springs and other changes) over the tracks and it wasn't really much different than the stock setup. The urethane sway bar mounts are also worth it as long as you're under there (and they're dirt-cheap).
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