Sentinel Tuning Division

Sentinel Tuning Division is a division of Übermacht specializing in tuning parts for the Sentinel featured in the HD Universe of Grand Theft Auto. It is likely a parody of Subaru Tecnica International (STI).

Sentinel Tuning Division's abbreviation is STD, which is based on the abbreviation for Sexually Transmitted Disease.

Sentinel Tuning Division's  logo can be seen on all mafia Sentinels spoliers in Grand Theft Auto IV.