It's not much more, but it's still more, and more is good.
Subaru's 305-horsepower sport sedan is primed to get a little boost in power for 2019 - and you can thank the limited-edition Type RA from 2018 for the upgrade. According to The Truth About Cars, a document sent by Subaru to the National Highway Traffic Safety Administration and published on April 11th showed a jump of 5 horsepower for the 2019 Subaru WRX STI, bringing the total number of ponies to 310 from its 2.5-liter turbocharged boxer four-cylinder engine.
This hop in horsepower is likely due to the WRX STI adopting some of the same engine modifications as the Type RA - namely “a high-flow exhaust, larger intake, and retuned engine control unit (ECU) for slightly greater top-end oomph,” reported TTAC. The Type RA was also gifted other performance goodies that likely won't back their way to the standard STI, such as carbon fiber roof, Bilstein shocks, and a modified vehicle dynamics control system. It's priced at $48,995 plus $860 for destination and delivery, $8,100 more than the STI Limited. Dominick Infante, product communications manager for Subaru of America, wouldn't confirm the update, stating it’s “too early for us to comment.”
The WRX and WRX STI still live atop the previous-generation Impreza platform, even though that model moved to new bones for the 2017 model year. The Crosstrek, which is more or less a jacked-up Impreza-based crossover, made the switch to the new platform for 2018. The WRX and STI models aren't expected to adopt the new architecture until 2020.