OBX Performance Exhaust Manifold Header 00-05 Lexus IS300 2JZ-GE (Drift Race Spec.) Precision CNC machined flanges with TIG and MIG welded construction Utilizes factory 02 sensor position Value Added Bolt On Headers with Gaskets & Hardware included as shown Backed by OBX Limited Lifetime warranty from manufacturer defects OBX Genuine Products Design and Quality of OBX U.S.A.