There will be a difference, but not much. It's not actually worth the effort.

What it will do is make setting the needle a bit different.

And it probably will be a bit louder. And that usually convinces most people that they've made a major change. After awhile most of them realize that if it did increase anything, it was just the sound.

Almost always, if you think you need more power, swapping in a larger engine is the best thing to do. You won't get the extra power you were wanting just by pulling the baffle. We've got a field full of airplanes using the 46AX. A couple of them have the baffles out of their mufflers. They aren't the fastest airplanes out there. They weren't really any slower when they had baffles in their mufflers. Not by enough that it mattered.