Hell I don't know. Here's Sun Automobiles explanation:
"How does it work?
In any electrical system, electric current flows from the positive terminal to the electrical components, and back to the battery through the negative terminal. However, the way that the factory (stock) grounds are set up, the electrons must travel through the steel and/or aluminum components in the car to complete the circuit, which creates much electrical resistance (steel/aluminum are not the best materials for electrical
conductivity). This resistance disturbs the flow of electricity to a degree that electrical components such as the ECU, lights, spark plugs, etc. cannot perform at maximum efficiency. In order to get the highest performance out of any automobile, it is necessary to achieve an efficient flow of electricity with the least resistance along its electrical circuit. By providing a direct ground path using highly conductive 99.99% pure
copper, this electrical resistance is reduced greatly (as much as 10 times!), resulting in an ultra-low resistance ground path. In short, Hyper Ground System affects the electrical system similar to how a high performance intake & exhaust system affects the mechanical system, by scavenging power which would otherwise be lost due to system inefficiencies."
Best wishes and keep on modding April 2009 SOTM, July 2009 ROTM, 2009 FF ROTY
RIFF CREW, Sedan Revolution #137, TEAM Duratec #181, Bremerton Raceway #658, NW POSSE #6