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gt350 air assembly

  1. tuning with slightly modded ecoboost mustang

    Mustang EcoBoost Performance
    I tuned my '15 ecoboost mustang with the ford performance calibration and the GT 350 CAI set-up. I was wondering if anyone knew if to tune the ecoboost mustang with other tuners like SCT X4 or Cobb, would I need to tune everything back to stock or just change the tune/calibration back to stock...
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