3" 409 Stainless Steel Construction: This exhaust system is constructed of 3" mandrel-bent 409 stainless steel tubing for maximum strength and durability. High-Flow 409 Stainless Steel Muffler: This system features a high-flow 409 stainless steel muffler, producing a throaty sound. Installation: Requires cutting factory exhaust. Computer-Aided Design: Utilizing state-of-the-art computer-aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. MIG-Welded: 100% MIG-Welded for race-proven strength and durability. Note: Some cutting is required, see instruction sheet for further information. Emissions Disclaimer: This product does not require a CARB EO#. aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.