For Subaru Impreza WRX/STi TMIC Top Mount Intercooler Y-Pipe Kit (Blue Silicone Hose) - GD GG EJ20 EJ25 Direct Bolt-On Top-Mount Intercooler Y-Pipe Kit Made of High Quality Lightweight Cast Aluminum Inlet: 1.5" X 2.55" Perfect for Turbo DIY Project Increase 65% Air Flow comparing with other Standard Piping