sa pagkakaintindi ko dito sir, yung grounding kit is also known as high tension wires...ang alam ko (not sure, though), it ensures good flow of electricity throughout the car... given the demand (of electricity) in the engine, ecu, all kinds of sensors, lights and other accesories and subjecting the car through punishment of daily driving (paved/unpaved, potholed, abrupt start/stopping), the battery and it's components (including wires) may not be able to give it's full potential... at dun mas nagiging effective ang grounding kit/high tension wires...
well, that's what i think it is (again, not sure about it)...

