Replaces the restrictive sound suppression system located between the water box and hull exit on your watercraft. Improves engine performance by reducing back pressure and harmful detonation. Includes mandrel bent aluminum tubing that is powder coated to prevent corrosion, high-temp silicone replacement coupler and installation instructions. Fits 2018-19 Sea-Doo RXT/GTX 300/230/155 units. NOTE: For use with RIVA GEN-4 Power Cooler