Ground wiring kit

I'm looking into buying a ground wiring kit. Are these worth buying? It looks like they're supposed to allow better connections of ground. Does it really do anything? It says they're supposed to get 5-10hp too. Obviously there isn't 5-10hp. Company's numbers. lol. It looks like it connects to the (-) battery terminal.... then what? Where do the rest go then. Firewall and all? Thanks.

Dsmtuners.com has an article in the tech guide section under electrical/wiring, that shows you how to make one yourself. I think it was done on a non turbo, but you can still get an idea of how it works. My friend has one on his honda accord and he said it made his interior lights and headlights brighter. Im sure it helps a little, better grounding can never really be a bad thing, but I too doubt the 5-10 hp claim aswell :)

Cool,. Thanks