Ecotek

Hi guys

Been looking at Ecotek's WEBSITE (http://www.ecotekplc.co.uk/) and was wondering if anybodys tried these, and if they have, do they work?, better fuel economy, better low end pick up etc.

Also do you need the filter on as well??

A couple of friends have these, one on a toyota gt4, and one on a scoobie and they both claim they work well, just wondering if they work on the GT's(p11)

Thanks

Chris