OBX Performance Exhaust Header 00-04 Celica (GT Only) 4-1 Race Style New Stainless Steel Precision CNC machined flanges with TIG and MIG welded construction Utilizes factory 02 sensor position Value Added Direct Bolt On Set Up with Accessories included as shown Dyno Tested Track Proven to Increase Low End High End Torque And Horse Power Backed by OBX Limited Lifetime warranty from manufacturer defects