Hello My Bruda bought magnetic clamps from ebay a month ago for his car. Now his car consumes 1 liter less fuel. I want to install this now also in my Audi 80 b4 2.0E 85kw. Here is the product:http://cgi.ebay.at/20-SPRIT-SPAREN-V…QQcmdZViewItem One magnetic clamp has to be mounted on the air duct and the other on the fuel duct. At the air duct I have to take the ones from air filter box or??? And fuel pipes run 2 side by side over the mo are these both supply lines or is it a supply and a discharge?? So my real question is which of the 2 sprite lines I have to take? please answer