The 4″ Cat-Back Exhaust (S5259AL) is a high-performance exhaust system designed for race cars. It features a single side exit and a race profile, making it perfect for track use. The exhaust is also equipped with Armor and Lite technology, providing durability and weight reduction. Its key features include a 4″ diameter for maximum airflow, a single side exit for improved exhaust flow, and a race profile for optimal performance. The benefits of this exhaust include increased horsepower and torque, improved exhaust sound, and reduced weight for better handling. Its unique selling points are its race-specific design and advanced technology, making it a top choice for serious racers.