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100+ Octane support
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Focus RS Custom Tune ECU Calibration / Big Turbo Upgrade by Tunewerks Fuel:91 octane 100+ Octane supportFocus RS Custom Tuning Take your Big Turbo Focus RS to the next level with Tunewerks custom tuning and FULLY optimized ECU calibration for your Cobb Accessport. Nothing will surpass custom tuning when it comes to increasing the output of your Big Turbo Focus RS! When upgrading your turbocharger it's even more critical that you acquire purpose built programming. The OEM ECU calibration will limit the output of your big turbo upgrade and cause a
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