Quickest way to find out if they'll fit and how much leg room you'll lose is to find the mounting depth of the sub. Take that measurement and find a split truck box that has the required mounting depth for your sub. It should have the dimensions of the box. The total overall depth at the bottom of the box will be the room you'll need behind the seat. I would venture to guess you are going to lose 2 to 4 notches of reward adjustment on your seat. Or maybe not? Hope that helps.