Wow... Oh wow... These aren't known to be the sturdiest sub frame connectors I know, but the difference is still incredible. My floor has large sections of stainless steel screwed, POR-Patched, and fibreglassed into place so it was probably a little more spagetti-like than a car with a pristine floor, which makes the difference that much more noticeable. I'd say that a good three-quarters of the creaks and groans are gone. Easily the best $400 I've put into this thing over the past five years (parts+labour+taxes, a little pricier than I wanted but if I kept shopping around I'd never get the bloody things).