This BorgWarner EFR B1 63mm turbine housing with .85 T25 VOF wastegate is a replacement housing for EFR turbo assemblies using a 63mm turbine and the specified a/r and wastegate flange. The housing’s geometry and wastegate provision determine exhaust flow and boost control characteristics, so it should be selected to match the intended EFR B1 turbo configuration during rebuilds or custom assemblies.
BorgWarner Turbine Housing EFR B1 63mm .85 T25 VOF WG