WakeMAKERS 2006 Mastercraft X10 PiggyBack Rear Factory Ballast Upgrade Black Friday use our prop finder tool use our prop finder tool to look up our suggested props for your year Stainless steel hardware and epoxy coated circuit boards help wick away moisture so that the Javelin Amplifier can continue powering your speaker system for a long The ballast bags included in your Factory Ballast Upgrade are integrated into your boat's existing ballast system for automated filling draining This upgrade kit "piggybacks" the included WakeMAKERS FIT Series ballast bags in this kit that are placed in the rear lockers on top of the factory hard tanks