Improves engine performance by reducing back pressure and harmful detonation. Replaces the restrictive secondary water box located between the primary water box and hull exit on your watercraft. High quality aluminum exhaust tube will survive meltdowns & backfires. The mandrel bent tubing is powder coated to prevent corrosion. Features billet exhaust outlet with laser etched graphics that is anodized to prevent corrosion. Includes high temperature silicone couplers along with detailed installation instructions.