About this part
Full-size adapter for mounting an HKS SQV 4 blow-off valve to the factory recirculation plumbing, returning discharged air to the intake system. Verified fitment is the fourth-generation Subaru Legacy BL/BP (2003-2009) with the compatible valve and flange arrangement. Intended for engine-bay service; print in ABS, ASA, or PA-6 CF and verify gasket seating, hose routing, clamp retention, and clearances before operation.