yea i went and ran my 0 gauge through my fire wall started around 1 didnt finish till bout 5. Had a few set backs on not being able to get through the fire wall lol. I ended up spending like 60 bucks at one of the local shops and all i got was a fuse holder, 150 amp fuse, 6ft. of 4 gauge, and 2 ring terminals. I used a bench vice to crimp my terminals to my 0gauge, then i did a pull test to make sure they wouldnt come off. I only upgraded my alt + to batt+. Also because i have a side post batt in my car and its odd how theres 3 stock wires to my positive batt terminal one was the alt positive but i didnt know wat the other 2 were for.