This DPF-back exhaust system is constructed of 3" mandrel-bent 409 stainless steel tubing for maximum strength and durability. Finishing off this exhaust system is a 4-1/2" diameter polished 304 stainless steel clamp-on exhaust tip. The tip features a laser etched aFe POWER logo for a unique style. Utilizing factory style hangers this system is a direct bolt-on system, which requires no cutting or modifications for a hassle-free installation. This DPF-back exhaust system uses a heavy duty flex pipe with an internal interlock liner for added strength and durability. Utilizing state-of-the-art computer-aided design technology, this exhaust system is designed for custom, high tolerance factory fitment. 100% MIG-Welded for race-proven strength and durability. Intercooled tubing provides reduction in exhaust gas temperatures. Large Bore-HD 3 IN 409 Stainless Steel DPF-Back Exhaust System w/Polished Tip GM Trucks 20-22 L6-3.0L (td) LM2 GM Trucks 20-22 L6-3.0L (td) LM2