I figured I'd post this in case anyone was looking at getting one of the Hyper Ground Systems kits (hot earth ground). I did mine today out in the 20degree weather, made it kinda hard to work with the washers that came with the kit but after I got it installed it was definitely worth it. The car seems to idle smoother and you know the feeling when you hop in the car and you can just tell it's running great.....well it does that all the time now. I would definitely reccommend this mod. I picked my kit up from www.group5motorsport.com for $108.95 shipped. Very imprezd.