you fuse to protect the wire, a 250 amp fuse is fine for 0 guage. the fuse holder goes under the hood near the batt. keep the fuse holder with in 12 inches of teh batt.
any other reccomendations or a way to get it cheaper? this comes out to about 125 before shipping and tax //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif