No door panel removal necessary on my 2017. Took 5 minutes. lol.Been eyeing aset. I was the install? I remember needing to take off the door panel depending ir it was a early model 718 or a late 718.
One small interior trim piece comes off, t20 torx screw, pop off the factory piece, put on the AWE diffuser, tighten t20, interior trim piece back on. Super easy.