The Forced Performance red XR turbocharger for Subaru WRX and STI applications features an 84mm CH10CM turbine housing with an external wastegate and includes an oil feed line. The 79HTZ model cue and CH10CM sizing identify the turbine configuration while the external WG option keeps boost control outside the housing. Use this external-wastegate red XR unit when that housing size and WG layout fit your Subaru setup.
Forced Performance Subaru WRX/STI XR Red 79HTZ Turbo 84mm CH10CM Turbine Hsg External WG w/Oil Line