i just ran 4ga through the passenger side gromet today. it was hell of hard to get the fat wire through the rubber. especially when its behind the engine. and i barely had enough wire to go all the way to the trunk. but it worked. id reccomend the driver side. wish i would have known about it before today.
off topic: i gotta question for some of the more experienced audio guys.
Iv got a 1000w (peak) amp, and 2 12's. Is 4ga big enough? the package says 1800w but i hear all the stories about people with 1000w amps running 0ga. does it really make that much of a difference?