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exhaust

  1. cobb ap v3 stage 3 question

    Fiesta ST EcoBoost™ Tuning
    hey I switched from a rotary to a fiesta st not too long ago(been wanting one for a while lol).....and had a question regarding stage 3 on the cobb ap v3 and was hoping somebody would be able to help me out. Well my question was until I decide to swap out the turbo with an aftermarket/bigger...
  2. What Exhaust Is This?

    Fiesta ST Chat and Discussion
    I recently bought a used 2014 Fiesta ST. It appears the previous owner did some light modification (I think the symposer has been plugged and the exhaust is not stock). I wanted to see if someone could help me figure out what exhaust is on my car. My best guess is that it is the MRT Rally Sport...
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