Ground Wiring

I used about 2 meters of 4 gauge wire as in the following links (scroll down to find the tab ''ΣΥΝΟΔΕΥΤΙΚΑ ΑΡΧΕΙΑ''to see their specs):

copper crimp connectors

wire

I built the following wires (length is not standard as there are different ways to do it):

Intake manifold to Right fender

Intake manifold to Valve cover 

Intake manifold to Central point (near FPR)

Central point (near FPR) to Tranny grounding point

Central point (near FPR) to Battery Negative

Battery Negative to left fender

Overview (not so clear)

After installing I noticed a slightly smoother operation of the engine (mostly on idle), slightly better radio reception and higher charging voltage (my Scangauge now saws 13.8-13.9 compared to 13.2-13.4 volts before). 

The tools I used and the crimping procedure I followed:

It was difficult to crimp by hand so I used a hammer to hit my crimping tool

The grounding points:

I used a new bolt for the tranny (the old one would not fit)

Grounding connections:

 I used sandpaper for the old connectors and the new grounding points.

Useful links and many thanks:

http://vwroadtrip.peterbeers.net/GTI/GTI_Mods/Overkill_Ground/overkill_ground.htm

http://www.wak-tt.com/mods/eearthing/engineearthing.htm

http://www.billswebspace.com/groundingkitinstall.pdf