haha :lol: , this one if u ask me, sure i can ans liao lar.... :P , the more grounding on the battery side connect with the chasis(body grounding), it will make the return current flow smooth back to the NEGATIVE area, just like the water piping system, more piping of course the water will flow faster to the tank area mar :rolleyes: :rolleyes: , don't piam me if i'm really wrong here :D :ph34r: . there is only benefit....yet no bad result, also when the car charging the battery, will be full charge. Becos every electrical device they all need grounding, spark plug, ignitor, generator and other link device like radio and soo soo soo.. :blink: :blink: DIY of course can lar, more cheaper depend on how the length u wanna make, hey artnet, if u interest i can show u how to make it lar, my car also got ler...heheeh :lol: :rolleyes: