well, he has some thick wires and we're trying to make a ground wire system for my e46, we looked around today, but didn't really find any points, since most of my 325i has covers over everything. thus we were looking for points that had a bolt, nut, etc...
I got Hyperground ground wires for my Maxima, some people dynoed and got some +hp, butt dyno seems a little faster, but I haven't got any dynos myself before and after, but I do notice that the audio system doesn't fade out any when starting up the car, etc. Basically, the mod can do no harm, but I'm not gonna claim +5hp or anything. hmm, apparently not that much info out there on them, even on google.
anyways, here is a set for $110, definitely not worth THAT much imo, I paid that much maybe 5 months ago or so...
http://www.phase2motortrend.com/phase2motorsports/hypcabnew.html