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It's not, high rev engines have stronger rods from the OEM if anything. Well okay that's probably not right to say, but increasing revs is VERY hard on the internals.
As for this particular engine, everything is speculation at this point but direct injection makes it hard to FI because if the injectors can't give enough fuel, the direct injectors are going to be much harder to find replacements for, and tuning will be harder.
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