I hope you can deal with your drone with the changes you are making. But my personal experience with this is that nothing will kill the drone other than some sort of after-axle resonator.
If you find an alternate fix, be sure to let us know.
We'll see how it turns out. I have never been a huge fan of the turndowns so getting regular or dual exhaust tips will be a visual more pleasing to me and probably worth the investment. Again, I can add length to the back if I add a 90 degree bend an extend it to a "side exit" exhaust and if that doesn't work, then I'll have enough room for resonators.
