Vandemon without Tune

So... I have a 2021 on the way and a Vandemon full system in a box. Vandemon claims that the bike will run fine without a tune, and that a tune is only required to squeeze the most out of the system.

My question is: Has anyone mounted the full Vandemon without tuning? If so, do you have any issues that would require the tune...Popping on decel, flat spots, etc.

I really only want to mount the pipes for the looks, and I’m pretty sure I will be happy with stock power. At this scale of power, I would opt for reliability and staying in warranty over massive additional power gains. I just want to know if I will NEED to tune or not.

Thanks for any input.