Twin Turbo EJ20 Subaru Impreza STi Time Attack Project | OnBoard @ Imola & Unique Engine Sounds Drag & Track by turboandstance - June 24, 2021March 17, 2026 Twin Turbo EJ20 Subaru Impreza STi: What you see here is a Subaru Impreza WRX STI powered by a twin turbo EJ20 engine, one turbo for each bank of cylinders. The car has been built by GMC Racing for time attack purposes and is still under development. Watch the video below to see this twin turbo impreza in action, leave a comment and share this beast with your friends. Follow us also on Facebook, Pinterest or Instagram! THE LEGENDS.. 800HP R34 NISSAN GTR v 800HP SUBARU IMPREZA WRX STI