I probably am repeating this but has anyone bought one of those Ebay kits? just trying to figure out what gauge wire they come with thanks!

sorry Ebay ground wire kits

I think generally they're 8 ga. kits... depending on how much they're selling them for, it'd probably be more beneficial to get some 2 or 0ga. wire and add on to your existing wires from the alt+ to battery+, battery- to chassis-, and chassis- to engine-.... there should already be factory wiring in this configuration if you follow the wires from your battery but adding in larger ga. wire will decrease resistance and allow a better voltage flow and give a more stable voltage.... don't expect to see any gains but you might experience a more smooth idle.... all in all it's just a healthy precaution for your electrical system....

CLICK HERE (http://www.scionlife.com/forums/viewtopic.php?p=1291193) for a thread about the "big3" upgrade

I got a custom kit made from 4 gauge stinger pro wire. Ground wire should be 4 gauge imo. It works pretty good with a slight improvement on throttle control.

check out the sponsored sales or www.groundfusion.com

The groundfusion stuff are nice but only 8 gauge wire. Good ground kit suppose to be 4 gauge. I paid $102 out the door
so for about $20 more, I rather would do 4 gauge. Just goto your local car audio store, they can pretty much do it for about same price on 4 gauge wire.