Subaru Impreza WRX STI Hatchback + Hillclimb + Turbo Flutter Acceleration & Sound Drag & Track by turboandstance - February 22, 2019March 6, 2019 Check out this modified Subaru Impreza WRX STI hatchback in action at the FIA Hill Climb Masters race in Italy! What about that awesome turbo flutter sound? Love it! Watch the video and leave a comment beloe or share this one with your friends. Leave a comment