Forced Performance Blue 73HTZ turbo for Subaru STI pairs a 58mm compressor with a black housing and an external wastegate, supplied with an oil line and intended for compatible STI applications. The description centers on the external WG layout and the specified compressor sizing drawn from the source text without extrapolating supporting modifications.
Forced Performance Subaru STI XR Blue 73HTZ Turbo 58mm Black Housing Ext WG w/Oil Line (D/S Only)