aFe 49-46207 Mach Force XP 2.5" Cat-Back Exhaust System for Jeep Wrangler 4-Door V6 3.8L 2 Year Limited Warranty 2.5 in. Mandrel Bent 409 Stainless Steel Tubing High Flow Muffler Maximum Flow OE Style/Welded-On Hangers 2.5 inches diameter tubing 409 stainless steel 2.5 inches mandrel bent Creates maximum performance Free flow muffler