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  1. Reground Cams for m54 engine?

    Driveline, Engine & DME Tuning
    my idea was to go to a junk yard or buy some used cams for my car thats a 02 325i with m54 or just buy some stock ones for cheap. then go to a machine shop and have them regroud to a higher degree?? i am not too sure like what specific degree but im just guessing. or did bmw already make a good...
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