Product Info
Select the discharge style to match the vehicle setup. Dual Port uses staged recirculating and atmospheric outlets and can be configured for full recirculation with its supplied blanking plug; this Subaru version is not designed for full-atmospheric conversion. Plumb Back returns discharged air to the intake. Supersonic is the atmospheric option; confirm engine-management compatibility before selecting atmospheric discharge.
Kits include the selected valve, gasket and breather crossover hose/fittings. Dual Port and Supersonic have a yellow 20–22inHg vacuum spring; Plumb Back uses a red 14–17inHg spring. Confirm the selected SKU and applicable emissions/use requirements before installation. Fitment stated here does not cover STI or later WRX models.

