Looking to install OEM active valve mufflers on my 2019 Mustang EcoBoost.

Wondering if the valves opening and closing, thus changing exhaust back-pressure would cause the engine to run lean/rich and do long term harm to my bone stock car.

Long term reliability has priority over sound for me but if it has ZERO effect then I will go ahead and do this.

Thanks in advance


1 Answer 1


An OEM setup will be fine. Ford will have different fueling maps set up for each setting. Doing this without the electronics built in would be a mess but it's quite safe as long as the car knows what is going on with the exhaust.

  • $\begingroup$ Yes. But if I do this I would not be changing the fuel maps. I would only program the instrument panel cluster IPC module to allow control of the valve actuators and settings through the wiring harness. I don’t think the IPC has access to change fuel maps. $\endgroup$
    – Ardalan G.
    Aug 26, 2020 at 9:23
  • $\begingroup$ yeah that's not gonna work. It needs to talk to the fuel computer. I wouldn't do it. $\endgroup$
    – Tiger Guy
    Aug 26, 2020 at 9:37

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