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N55 or N20? Ever been over-revved? No motor should have required timing chain replacement at 66K miles. N20 timing chain setup sucks and has extended warranty because of it, up to 100K miles.
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F25 X3 35i M Sport | Frankenfold 6662 | VRSF Race IC | FTP CP | BM3 tuned | XDI-35 HPFP | Stage 2 LPFP | Ethanol mixed | WMI | Oil cooler | xHP | X5/550i brakes
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