http://www.jscspeed.com/universal/electronics/lineage_groundingkit.htmJapanese tuners have long been using a method called "earthing", where they take large gauge cable and connect it through various points of the vehicles engine bay to help the electric current ground itself for more efficient flow. Lineage grounding kits have perfected these methods. Through time the trend eventually made it to the USA where we call it "Grounding". What is a grounding kit? Grounding kits are usually made up of 8 gauge cable that is crimped copper or gold ends that bolt to the chassis of the car which upgrades a vehicles electrical system.