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  1. Stock internals on the second generations?

    2010-13 Mazdaspeed 3 Engine and Performance
    So I'm wondering how strong the block and stock internals of the second gen's are typically good for? I have a GT35R from a previous build for a different car, not sure if its a good idea to save it for the MS3. Other than the limitations in our fuel system, are there any other components...
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