Yes, I started with a Magnaflow muffler and left the resonator on with flapper. The flapper created the drone and I quickly clamped it open. The resonator left in place it sounded good as it was new to me but after a week or two it wasn't want I wanted to keep so I cut off the resonator and added some dual tips and that make the sound complete and what I was looking for. Don't hesitate to cut it off but also I like doing things in stages so I tried with it on first.