[starterman99]

The highest rated stock 12si is 94 amp. Depending on distance of wire 8 gauge would be sufficient and I would go all the way to the battery. Think of your wiring as a water hose, if you start off with a 3/4 inch hose and couple it to a 1/2 inch hose you can only flow as much as the smaller diameter will carry, so the larger one does no good once it is restricted.