Lol well my sub box takes up 1/3 of the trunk and i can still fit a recycling bin. I might get a smaller box though.
The sedans S is a little more tricky. There was only 4 bolts close enough to reach the amp, and all 4 were the same size, and were a hair to big. So I just made my own. Behind the seats, there is this metal bar in the middle of the backseats that goes from one side to the other side of the car. But I screwed in a piece of wood from that middle metal bar to the top, and mounted the amp up on that piece of wood. Somewhere on that metal bar, I took a screw and a washer, and screwed the ground wire onto the metal bar. It works fine that way too.Backseat support bolt. 16mm in the middle.