Before the Impreza switches to a new platform, Subaru is wringing more limited editions out of the old one. The most recent, the Subaru WRX S4 tS, is a Japan-only special that is based off of the WRX S4 model released a few years ago.

Underneath the hood, the WRX S4 tS gets the same modified 2.0-liter turbocharged flat-four from the WRX S4 that generates 296 horsepower and 295 pound-feet of torque. The modified engine produces 28 horsepower and 37 pound-feet of torque more than the standard WRX, and is only five horsepower off the turbocharged 2.5-liter Boxer engine in the WRX STI, while making more torque.

The handling has been improved thanks to a similar setup to the one on the WRX STI S207, another Japan-only model released last year, that features adjustable DampMatic II front suspension from Bilstein, along with other goodies.

The exterior gets 19-inch BBS forged aluminum wheels, red pinstripes on the front grille and rear bumper, and a large front spoiler. On the inside, the WRX S4 tS benefits from Recaro bucket seats and a luminescent speedometer. The sedan is also equipped with Subaru's advanced safety features in the form of EyeSight.

Japanese enthusiasts can also choose a more hardcore option with the NBR Challenge Package that commemorates the automaker's victories in the SP3T class of the Nurbrugring 24 Hours in 2015 and 2016. The sportier model gets 19-inch wheels from BBS, a carbon-fiber rear wing, special badging, and a suede-lined steering wheel on the inside.

We reached out to Subaru to see if the vehicle would be sold in the US, but the spokesperson refused to comment. With the WRX S4 and the S207 being Japan-only models, we doubt the new limited edition WRX S4 tS would be offered outside of Japan.

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