
Turn off your ANC
Seriously. If you have Active Noise Cancelling, and have a modified exhaust of any sort… disable the ANC. I thought for sure I needed an additional resonator in the line somewhere, but turns out the noise cancellation was ADDING noise to the cabin because the pipes pissed it off. Cabin got so much quieter after disabling ANC with alfaobd. Why would noise cancellation make the cabin louder you ask? Yeah, me too. But it did. It’s much better turned off. I haven’t found a reason yet to wish it was turned on. For reference sake, 21 tradesman with base 6-speaker system, 4” pipe front to back with an MBRP muffler inline about the middle. So, so, so much less noise in the cab without noise cancellation.