OBX Performance Turbo Catback Exhaust System 06-08 Audi A4 S4 B7 2.0T Quattro A/T ONLY High quality Premium T-304 stainless steel Value Added Direct Bolt on/ Weld on Set up with Nut, Bolt Accessories Included Precision Computer CNC machined flanges with DUAL-TIG welded construction Backed by Limited Lifetime Warranty from Manufacturer Defects OBX Genuine Products Design and Quality of OBX U.S.A.