first ISX engine I know nothing about it any help out there

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(11-22-2019 )trucker1975 Wrote:  it is supposed to have a new top end at 400000 but I'm still trying to find out exactly what that means

Most likely this is not a good thing, rarely are they done right. Also try to find out WHY they did it, that could reveal a lot about what you can expect to happen in the near future