i am using 4 gauge for my fosgate power 500 and my punch 500. Never had any problems. I used 1/0 gauge when i had 2 Power 1100's, 2 punch 100's and a punch 55...along with 6 caps and an extremely large alternator. When i ran the 1/0 (in a nissan truck) i ran it under the car and came up through the floor board. Was much easier this way. Just wrap it in wire loom and wire tie it to the frame (or unibody).
My other ride is a CH-47D "chinook" helicopter, with 2 engines pushing 3750 HP each this thing can haul, a few Z's that is. I can fit 2 Z's inside and sling load another 3 outside. To bad the Army will never let me try it.
