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I want to install a grounding kit, does it make a power difference, if so by how much? and what is the best one out there? Thanks

 
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i have a question too, is a grounding kit a swap since you're putting new wires in or forced induction? please try to post in the right forums, and searching will also help get results.

that said, i had one and really didn't notice a difference. maybe a little less dimming with headlights.

 
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I have one my lights still dim. The point is to make a better ground to your valve cover and transmission (if you have an a/t). I want to say I noticed a difference but it could also just be in my head. I'll tell you what though with all my mods put together every little bit helps. Hope this helps.

 
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First, wrong forum....

Second, try a search for "grounding kits" and you'll get around 20 threads talking about if people think they work or not, and also how to make one on your own relatively cheap....