Subaru Tecnica International (STI) has released the BRZ tS, a complete car based on the Subaru BRZ, on June 30 with production limited to 300 units. The phrase "strong and flexible running performance" comes to mind when you think of STI. However, even the BRZ tS has to make efforts to achieve this running performance. Well then, what is the true nature of this strong and flexible running performance? Hiroshi Mori, director of product development at STI, was interviewed.