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  1. No Power Over 4000 RPM

    MINI Cooper S
    I have a 2005 Mini Cooper S. I just replaced my supercharger pulley with a 15% reduced pulley with a +2% ATI Crank pulley. I got NGK BKR8EIX sparks plugs and a 1360mm serpentine belt to complement these upgrades. I have noticed that I have no power of 17 PSI of boost. Looking at the...
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