The grounding kits do have a function; To reduce electrical resistance. It is absolutely a measurable difference. Some people claim to feel a difference and some claim to not be able to feel any difference. I have one the one that Jumbosrule referenced and I felt a difference. Jbaker1121 made his himself and did not notice any difference. By far the majority here who have grounding kits installed cite positive effects.
To answer your question, there are many different options for you. My personal recommendation is the one I have installed, which is very affordable and effective. This one: https://www.infinitiscene.com/search/1/?q=s...ead.php?t=7780
Where can i purchase this ground wire kit? who do i contact?
The grounding kits do have a function; To reduce electrical resistance. It is absolutely a measurable difference. Some people claim to feel a difference and some claim to not be able to feel any difference. I have one the one that Jumbosrule referenced and I felt a difference. Jbaker1121 made his himself and did not notice any difference. By far the majority here who have grounding kits installed cite positive effects.
To answer your question, there are many different options for you. My personal recommendation is the one I have installed, which is very affordable and effective. This one: https://www.infinitiscene.com/search/1/?q=s...ead.php?t=7780
kinda like your ground wire for your subs and amp?