It should be fine, even the tuned by STi Lib's are just 205's/255's. I don't think the internals would be different. But like said above, a quick dyno run to check the health of the engine would be a good idea, Japanese are notoriously bad at maintenance.

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F.B. Racing
01 WRX (STI badged)
2010 XR5 Focus
06 Impreza Hatch 2.0i