Japanese brand issues another preview image ahead of January 14 reveal in Detroit.

Subaru of America has issued another teaser of its new WRX STI S209 limited edition this week, this time showing the vehicle's front grille.

Last week the manufacturer published a YouTube clip showing a camouflaged prototype doing rounds at the Virginia International Raceway in the States, sporting some noticeable changes compared to the 'standard' WRX STI.

A racier body kit and extra aero bits are the key changes from the outside, along with a bigger (and probably louder) exhaust system.

It's likely the S209 will be pretty similar to the S208 launched exclusively for the Japanese market during 2017, which featured gloss black sill and bumper extensions, carbon-fibre add-ons, Bilstein dampers and coil springs all round, along with a more potent 242kW/437Nm (up 21kW, 25Nm) 2.0-litre turbocharged boxer engine – it's worth nothing export markets get a 2.5-litre engine.

Other changes should include model-specific interior appointments – think bucket seats, Alcantara trim, and unique colour schemes.

The Subaru WRX STI S209 is scheduled to be revealed at the Detroit motor show on January 14. Stay tuned to CarAdvice for our coverage.