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Old 03-01-2009, 02:10 AM
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JCL JCL is offline
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Quote:
Originally Posted by sam48is
I thought it had to do with stricter emission standards in the US which lower horsepower by a bit. Guess you learn something new every day.
While not true for the M54 engine in the X5, that can be true as well if the difference is more than the SAE/Metric hp difference. A good example is the early M3 which was detuned for the US, or the new X5 diesel which has a different engine management program because of emissions requirements and the new urea injection system.
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