Ken Gushi has a 600hp fr-s i don't know what engine he got in it but that shows the capability of the car
Edit: The engine is a cosworht cs600.
"Ken Gushi was lucky enough to take not only a stock FR-S up to the scenic hills of Monterey, CA but also an early prototype for his GReddy Racing FR-S drift car!"
[ame="http://www.youtube.com/watch?v=aGso9oKcYtM"]Scion FR-S Testing at Laguna Seca - YouTube[/ame]
Her is a video of the build of the finished car
[ame="http://www.youtube.com/watch?v=uj9WYqHcw2o&feature=related"]GReddy Racing FR-S - Behind the Build - YouTube[/ame]
And a video presenting the car
[ame="http://www.youtube.com/watch?v=H0bGuL3It5g&feature=related"]Scion Drifting GReddy FR-S In-depth Preview - YouTube[/ame]