The 2019 Subaru WRX STI is available as a 4-door, 5-seat sedan. Starting at $36,595, the 2019 Subaru WRX STI Base is powered by a 2.5L , 4 -cylinder engine mated to a manual transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway. The top of the line 2019SubaruWRX STILimited w/Lip , priced at $ 41,395 , is powered by a 2.5L , 4 - cylinder engine mated to a manual transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway.