Genuine BorgWarner EFR turbine housing BorgWarner EFR 58mm turbine housing - 11581008001 Vband - 0.85 A/R - 58mm 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-6258 / EFR-6758 For turbine wheels: 58mm A/R ratio: 0.85 Turbine flange: V-Band 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!