2-1/2" 409 Stainless Steel Construction: This axle-back exhaust system is constructed of 2-1/2" 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 deep sound. Quad 3-1/2" Diameter Polished Exhaust Tips: Finishing off this exhaust system are quad 3-1/2" diameter black stainless steel clamp-on exhaust tips. The tips features a laser etched aFe POWER logo for a unique style. Installation: Utilizing factory style hangers this system is a direct bolt-on system, which requires no cutting or modifications for a hassle-free installation. 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. aFe POWER exhaust systems are engineered and manufactured in our Corona, California facility.