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The Forced Performance blue XR turbocharger for Subaru WRX and STI applications features an 84mm CH8CM turbine housing with an external wastegate and includes an oil feed line. The XR 73HTZ cue and CH8CM sizing describe turbine geometry while the external WG option places boost control outside the housing. Use this external-wastegate 84mm variant when your WRX or STI installation benefits from that layout and oil-fed lubrication.
Forced Performance Subaru WRX/STI XR Blue 73HTZ Turbo 84mm CH8CM Turbine Hsg External WG w/Oil Line
