The Garrett GT47 turbine housing kit supplies an overhoused turbine housing specified as O/V 1.23 A/R for GT47-series turbochargers. As a direct-fit replacement housing, it provides the O/V 1.23 A/R turbine housing for applications requiring that specific A/R dimension on GT47 turbos, allowing the housing swap without altering core turbo hardware.
Garrett GT47 Turbine Housing Kit O/V 1.23 A/R