IF YOU ARE INSTALLING A HIGH POUND THRUST MOTOR, SUCH AS A ULTERRA 80 OR 112 LB, AN ADDITIONAL STIFFENER PLATE MIGHT BE NEEDED TO ADD STRUCTURAL STRENGTH TO FLOOR AND DECK EDGE. IT ATTACHED TO ANY SUPPORT STRUCTURE UNDERNEATH. STIFFENTER PLATE AND HARDWARE NOT INCLUDED. THE TWO OUTSIDE HOLES ON FACE OF UNDERDECK FACE ANGLE ARE TO BE USED IF ADDITIONAL BOLTING STRENGTH IS NEEDED TO HELP STIFFEN BUMPER. THESE CAN BE USED OR RELOCATED AND DRILLED AS REQUIRED. BOLTS NOT INCLUDED.