OBX Performance Catback Exhaust 02-05 audi A4 1.8T Quattro B6 Auto Manual High quality T-304 stainless steel Backed by Lifetime warranty from manufacturer defects OBX Genuine Products Design and Quality of OBX U.S.A Precision CNC machined flanges with DUAL-TIG welded construction Value Added Direct Bolt On Setup with Gasket, Nut & Bolts Included