2015+ Supreme S21 Complete Ballast Upgrade

Optimize the performance behind your 2015+ Supreme S21 with our Bag Buster Ultimate Ballast Upgrade.

Our Supreme Bag Buster Rear Upgrade is a complete solution that includes four custom ballast bags and all of the required fittings for installation.

For the best possible surf performance, we've designed this boat ballast system to increase the total capacity at the rear of the boat to 1,730lbs of true loaded weight. If your boat has the factory surf system installed, this upgrade is a requirement to get the best performance.

The rear ballast bags are symmetrical and will fill the entire rear locker thanks to the angled outside edge that matches the profile of the hull. And because these bags are custom made, they connect directly to the factory fill/drain and vent lines for an easy, hassle free installation.

The under seat bags are unique both in terms of dimensions, which are sized for a perfect fit, as well as how they connect to the factory system for filling and draining. Our unique bridge system connects the midship bags directly to the front panel of the rear ballast bag. That allows both bags on each side of the boat to act as one location, but minimizes both sloshing and the lifting up of seat cushions that can occur when you have one continuous length bag in place.

Get the best performance from your new Supreme surf boat with our BagBuster Custom boat ballast system.​