OBX Performance Exhaust Header Toyota Corolla AE86 AE11 20v 4AGE High Grade T-304 stainless steel for durability and better disperse heat Backed by OBX Limited Lifetime warranty from manufacturer defects OBX Genuine Products Design and Quality of OBX U.S.A Value Added Direct Bolt On Setup with Gaskets & Hardware included as shown Precision CNC machined flanges with DUAL-TIG welded construction