1.25" Recirculation Adapter for HKS SSQ BOV Outlet Machined aluminum adapter to attach to the outlet port on the HKS Super Sequential Blow Off Valve and turns the BOV into a recirculated valve with 1.25" diameter outlet. Replaces the stock atmospheric vent that comes stock on an HKS SSQ BOV. Second most common out size for stock replacement (next to 1"). 1.25" fits applications like EVO, etc. Made in USA.