Thread: Velos Designwerks | Stage 1 Performance Tune for X5 5.0 (4.4L) | Introductory Offer
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      04-25-2013, 09:10 PM   #34
Phatcat
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Drives: BMW M5, X5M
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N63TU with valvetronic now puts out 445PS, compare to the old 408PS. Personally I don't think valvetronic is the main reason for the gain in horsepower, probably just a tune.
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