The 4″ Cat-Back Exhaust (S5248P) 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 Armor Lite construction ensures durability and protection against harsh conditions. Its key features include a 4″ diameter for maximum airflow, a single side exit for improved exhaust flow, and a race profile for enhanced performance. The unique selling points of this product are its lightweight design, high-quality construction, and improved exhaust flow for maximum power. With the 4″ Cat-Back Exhaust, you can expect improved performance and a more aggressive sound for your race car.