When will Subaru replace the aging US spec 2.5-liter WRX STI engine?

Next year, Subaru will introduce a new modularized platform called the Subaru Global Platform (SGP) that will support every model starting with the 2017 Impreza compact to the WRX STI performance sedan. The U.S. spec 2017 Subaru WRX STI could be getting the 2.0-liter turbocharged boxer powerplant that is in the Japan-only WRX STI S207 that was introduced at the Tokyo Motor Show in October.

All Subaru models including the STI will be coming with improved safety, better driving dynamics and increased interior space with Subaru’s new global platform. Subaru kept the 2.5-liter turbo power plant in the U.S. spec STI and it could be on its way out. Like Subaru’s new-generation WRX, performance enthusiasts could see the 2.0-liter turbo engine in the U.S. spec WRX STI as soon as 2017 or 2018 model year performance sedans. It will get more hp than the current 2.5-liter powerplant

It would come with upgraded internals like the Japan-only WRX STI S207 that features exclusive STI engine and suspension upgrades and tuned to get a maximum power output to 328 PS (323hp). The high-output balanced 2.0-liter turbo engine gets internal upgrades from STI that include an exclusive engine control unit (ECU), twin scroll ball bearing turbocharger, performance muffler with lowered back pressure mated to an exclusive rear exhaust pipe and STI-designed strengthened silicon intake duct.

Subaru’s 2020 Vision Plan that calls for further expansion through 2020 which will include new products, improved engines, increased production and cost cutting. The 2017 or 2018 Subaru WRX STI will likely get a new, more powerful 2.0-liter turbocharged engine in the U.S. to replace the aging 2.5-liter powerplant. Stay tuned.