Its basically a rotrex bodge and will no doubt blow up, being Italian and all. Check out he video on the site though - sounds quite nice. www.flygas.info.
Claimed 0-100kph of 3.9 seconds which I have to say is getting a bit boring now. How credible is it that no matter what model they start with, no matter what conversion they do, no matter even if its 0-60mph or 0-100kph it is always 3.9 bleedin' seconds. Another 3.9 seconds, what a coincidence eh?
Some blurb from the site, left as a google translation as its much funnier that way.
SUPERCHARGER GAS is a compact centrifugal compressor mechanic excellent command to increase significantly the power and performance of engines up to 3.000cc.
GAS SUPERCHARGER warrant an increase in performance of 30/40% without compromising the reliability of the engine . The centrifugal compressor has less space is can be mounted on a wide range of car models. The assembly is simple and can be executed at any workshop.
L 'high efficiency is the result of an excellent form and an accurate profile of the impeller . Exploiting the only area of maximum performance (referred to chart scope \ pression \ laps), is capable of generating a pressure up to 0.8 bar (1800 mbar absolute) at a low temperature and absorbing only a small power to crankshaft .
GAS SUPERCHARGER is currently the only centrifugal compressor built and marketed in Italy.