The width of the frame from wheel well to wheel well is 45" and the hiegth of the frame is 18 1/2". That gives you about 1/2" clearance between the frame and the lower part of the rear deck. Also keep in mind you have to smooth the corners down to put on the outer part of the trunk. Cause its curved right there at the ends. It took a few tries with a sander to smooth the edges down to where it would fit properly.
Here are some pictures again of the sub frame outside of the car before the installation was completed.
As you can see in this picture, the curve I am talking about that I had to cut into the frame.
Here you see both sides, the one on the right is not as perfect as the one the left is, but it gives you an idea of what you need to do in the corners to give the frame a decent fitted look.
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