I with you clay i dont see any reason for this being here. In my first rebuild of my motor i removed it and custom made my own grounding kit. Industrial 0 Gauge wire with gold plated connectors, I've only got two, one connected from the chassis to the gearbox and the other from the chassis to the intake side of my head on the right. I didnt notice any difference to be honest i dont even know how the grounding kits work performance wize.

I originally did it because i used to have a massive stereo in my car which caused a few grounding issues so i did this.