T-Joiner Tube and Aluminum Red. Straight Pipes. Aluminum Flanges. Each component is precision-machined to exact tolerances for trouble-free performance. Surface finish: Mirror polished finish only (not have any other coated,can be easy cut and weld) Application: Fabricate your own Intercooler piping, Turbo Intake Pipe, Air Intake Pipe, Custom Air Flow piping and so on.