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duel exhaust

  1. 2005-2010 V6 Mustang Tech
    ive had my mustang for almost a year now and i want to add duel exhaust to it. what do you guys recommend i get for my car?
  2. 2005-2010 V6 Mustang Tech
    hey i got an 05 mustang v6 and i was thinking of putting an offroad x pipe to duel exhaust it.. before i do it i wanted to ask other people that might have done this before some questions. does it decrease mpg? ho to bypass downstream o2 sensor? thanks
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