I remember back in the days when I used to install car audio systems in highschool, lots of fun but you should think about putting bar guard or a mesh guard to protect your subwoofer they sell them at crutchfield and a pluthra of other sources.

2000 4Runner Limited 3.4L 4WD: Brushguard, Yellow Optima Battery, Amsoil Air Filter, Denso Iridium IK16 Spark Plugs, Mobile Guardian,Eclipse 8435,Front Clear Corners and alot more....