Mike, it will go right in-u will need to twist yer straps to shorten them and run a line off of yer pisser to the fitting on the exit side of water box. The water line to the fitting on the exit side is to tone it down a bit and pick up a little top end power. My mod box has fittings on entrance and exit side of water box to 'tune' the box. For bottom end-add water to entrance and no water at exit for bottom or vice versa for top end, it actually made a noticeable difference to me.
i heard that they are made to order ?