Subaru BPV Adapter for FMIC WRX 2002-2007, STI 2004-2021812500 DESCRIPTION This adapter can be used to mount the OEM Subaru or COBB XLE BPV to a 34mm universal tube connection on the intercooler piping. The plate is threaded to accept included hardware. WHY? Want to keep your bypass valve but have a new intercooler kit with a different connection? Use the COBB BPV Adapter to fit a standard Subaru flange BPV to a 1" universal tube connection. FEATURES Subaru BPV Adapter for FMIC WRX 2002 2007, STI 2004 2021