This alloy SSQV flange is designed to mount to the EJ20 / EJ25 intercooler in place of the stock blow off valve on the GDA / GDB WRX and vehicles using the same intercooler such as some forester models. Note, this is different from the Type 2 and 3 flanges. May vary from photo shown in terms of colouring. Mounting holes measure 105.7mm C-C.