Looking for either a couple sets of Rockford Fosgate end caps, or one set of end caps and a link. For ~2000 model year 500a2 (black texture/crinkle paint). Like seen here (not my picture):
Good question. As measured with styrofoam packing peanuts, it came out to 2.5 cubic feet, which was matching adire's recommendation for a SQ size for the brahma 15.