Pro-Series Waterbox delivers increased horsepower and performance by reducing exhaust restriction and back pressure. Developed on a flow bench, our waterbox features radiused exhaust tubes and end caps for optimum exhaust flow. Innovative short design allows easy servicing of supercharger without removal of exhaust system. High-strength aluminum construction & precision welds will survive backfires & overheating. Powder coated to prevent corrosion. Includes detailed installation instructions.