Forced Performance Blue 73HTZ turbo for Subaru STI features an 84mm compressor in a black housing with an internal wastegate and oil line, listed for applicable STI models. The overview focuses on the larger 84mm sizing and internal WG arrangement as stated in the description, avoiding additional compatibility or tuning claims.
Forced Performance Subaru STI XR Blue 73HTZ Turbo 84mm Black Housing Int WG w/Oil Line (D/S Only)