Looking for a way to boost the performance of your Cummins Titan XD? Check out the AFE 49-06113 Atlas 4" filter-back exhaust system. This system is designed to increase airflow by up to 5%, giving your truck the extra power it needs to tackle even the toughest jobs. The aluminized steel construction is built to last, and the premium hardware includes high-quality band clamps for a perfect fit. Give your truck the boost it needs with the AFE 49-06113 Atlas 4" filter-back exhaust system.