Genuine BorgWarner EFR turbine housing BorgWarner EFR 80mm turbine housing - 12801008002 T3 singlescroll - 0.83 A/R - 80mm turbine wheel Genuine BorgWarner EFR turbine housing You receive a single genuine turbine housing for a BorgWarner EFR turbocharger, this let you choose which A/R ratio orientation of the flange and flange type fits best to your application. Fits the subsequent turbochargers: BorgWarner EFR-9180 For turbine wheels: 80mm A/R ratio: 0.83 Turbine flange: T3 Single Scroll Wastegate: internal Different A/R ratio? With this turbine housing you can fit your EFR turbocharger with a different A/R ratio. If you purchase an EFR turbocharger and wish to have a different A/R turbine housing, you have to order the corresponding turbine housing in addition. Notice: Mounting kit for turbine housing is sold separately!