05-ON Scion TC Racing Header 4-1 The Racing Headers are made with T-304 stainless steel, Mandrel bent tubing, CNC Machined Flanges. Each set is tested and dynoed to make sure the fitment and performance meet our goal. Each header comes with 6month warranty. Application: 05-ON Scion TC W/O catalytic converter for better performance T-304 Stainless steel with polish finish Direct bolt-on fitment