what subs/amp?
need to know before i can find you a wiring kit.
its pretty easy. going to need a drill, screwdrivers, couple of wrenches+wiring kit.
you'll be doing these things
drilling a hole in firewall of car to run the power wire through the cabin to the trunk
removing the plastic pieces at the bottom of your doorway on whichever side your battery is on and putting the power/rca/remote wire under it and screwing it back on
running it beside the back seat into the trunk
drilling a hole in the trunk for the ground bolt and putting it in
wiring everything together
secure the sub box if you have a simple way of doing it like a bungee chord from side to side(dont put it over the subs either above or below the subs on the box)