The Genuine Porsche Exhaust Muffler (911) - 99311104655 is a high-quality muffler specifically designed for the Porsche 911 model. It is made from durable materials and is manufactured by Porsche to ensure a perfect fit and optimal performance. This muffler is designed to reduce noise levels and improve exhaust flow, resulting in improved engine performance and a more aggressive exhaust sound. It is a genuine Porsche product and is a direct replacement for the original muffler on the 911 model.