Subaru introduced a significantly upgraded WRX STI model line for 2018, spearheaded by the WRX® STI® Type RA, a limited-production model inspired by a specially prepared WRX STI’s July 2017 record-setting lap of Germany’s famed Nürburgring racetrack. Engineered by Subaru Tecnica International, Inc. for driving enthusiasts seeking higher performance, the 2018 WRX STI Type RA is limited to 5...