I removed my stock grounding path since it becomes redundant with the groundwire kit. Others have left theirs in place. It's pretty easy to install by yourself.
Thanks, I'll probably just leave it in.
Guys, you can't seriously think a grounding kit is a performance mod??
It's to keep your audio system sounding pristine, making sure all sockets are grounded, no signal have interference. Do you know what it means to 'get grounded'? When you pump gas, they sometimes have signs to touch to get you grounded before you retouch the handle so that it doesn't cause a spark and ignite the gas. This won't give any horsepower, torque, whatever. The only way it might give a MINISCULE amount would be if it allowed the battery to put out a little more power or something...
Yes, the primary reason for doing this mod is the improvement of the electrical system - better audio, brighter lights, etc. However, realize that the electricity for this is all produced by the engine via the alternator. A poorly functioning electrical system will have more parasitic loss as more of the engine's power is diverted to the alternator. A healthy electrical system can do the opposite - help the alternator work efficiently, and minimize the amount of work your engine needs to do. I should also mention that turning on my headlights causes a noticeable drop in warm idle (about 100-150 RPMs), so if I can reduce that drop then that's less HP needed to power my headlights. Dynos have shown that it adds a negligible amount of torque to the car (maybe 0.5 ft-lbs). Performance wise it might be comparable to to removing the butterfly valve - there's a slight performance difference, but that's not the main reason people do that mod.