costs £48 plus about £20 for a little pipercross filter. Reckons you get better fuel economy and more performance.
Anyone ever bought one? did you notice any difference at all???

Steve

 

Snake oil. Remember what they say, if it sounds too good to be true then it probably is.

CCC tested it and it did nothing on a Golf. On a turbo it'll do even less as the manifold is pressurised not under vacuum. Still kept taking the adverts though, hypocrites.