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
