tower doesnt fit in garage by 1.2" can I cut this?

My tower will not fit by about 1/2"

I know I could lower tire pressure and everything, but that would get old very fast with the frequency which we will be pulling in and out of the garage. If I could cut out this middle piece between the header and the trim everything would be fine, is this something that can or should be done?

Hate to hear what my wife says when I have to build a pole barn because the boat wont fit