When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I'd imagine they're a bit of a bodge. At best you'd have the same ride height with springs of unknown rate and quality. At worst you'd have a weak platform on its lowest setting over dampers designed for a much longer stroke.
Worth a laugh for £105 though if all you want to do is slam the car disregarding handling effects, and want the quickest way to do it apart from cutting some coils off your existing springs.