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I'm sure the engine will hold up just fine. In my opinion it probably has a very good flowing head compared to the n55 which dies after 6k. That allows it to keep revving and keep making power. It does worry me though that it has such a long stroke compared to its bore. Whereas the S65 can take some extra rpms with an upgraded tune, I don't think this will be able to safely rev to 8k without getting some sort of upgraded vibration damper.
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