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  1. Check Engine light after Catted downpipe!!

    Mustang EcoBoost Discussions
    Hey guys, i installed the MBRP catted downpipe 2 days ago and just today the check engine light popped up. The company said that tuning is not required and no lights will come up. I'm surprised it didnt pop up as soon as i installed the car if it was gonna pop out anyway. Is it safe to drive the...
  2. OK. What do we know about RaceChip? Anything?

    Mustang EcoBoost Performance
    RaceChip function and installation TIA, Matt