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At the moment we can't really say what can be improved on the NA Flat4 because we have no data. If it is the EJ20, then I am going to get the 2,2l stroker kit.
However it can be possible to come closer to 300 PS staying NA. The BMW 320si WTCC has a 275 PS 2.0l I4 with redline at 8.500 RPM. Here other two Crosworth engines.
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