Originally posted by Patrick Olsen
Everything I've read says the bigger the cable, the better. If 4-gauge works, well, that's good, but I myself would go for overkill. All the guys in the Mustang world that do the trunk-mounted battery use 0/1-gauge welding cables - apparently the welding cable is more flexible than "normal" 0/1-gauge cable, and it's readily available at your local welding supply store.
'97 Legacy 2.5GT sedan
and all the guys in the r i c e b o y world use those 5" exhaust tips.