i ahve seen on ebay and a couple of other places grounding wire kits. they calim to improve your electrical system and gain horsepower. they are like 24.95. has anyone tried these or know if it is worth it . thanks

Complete and utter horseshit. The only thing you need to know about grounding is make sure it is grounded to your chassis, such as attaching your amp's ground to the bolt on one of your seats. :)