Synapse (SB001.13A) Blow-Off Valve Inlet Adapter Flange for Subaru Impreza Subaru OE TMIC BOV Base Flange is designed for Synchronic DV use This flange will fit Pre 2008 WRX and STI TMIC and 2008+ STI only This flange is incompatible with 08+ WRX (non-STI) TMIC Made out of Billet aluminum