Yeah, I'd say 8, but if you want to add more amps or power in the future I'd go with 4. Larger guage can't hurt you, it can only help. All you loose is a couple of dollars more. Depending on where in the trunk you mount the amp, you could need as little as 13' or as much as 19'.
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Nick,
'99 Contour, Zetec, ATX (ugh), Light Blue:
Sidemarkers, clear corners, badgeless, custom mesh grille, interior neon lights, CEG stickers, ventvisors, Radar Detector, KKM, no rez, Straight pipe muffler, Focussport wires, Accel super EDIS coil, more to come, No back seat, Lots of Dynamat, Panasonic CQ-DF800U, Kicker equipment: 2 ZR 360's, 1 ZX460, 1 ZR240, 2 Solobaric L7 12's, 1 resolution 6.5" component set, 1 pair of impulse 5x7's; All wiring by Phoenix Gold; DEI Python 1000 ESP Alarm
