We run the RC on our customs, but to be honest...If it made a difference, It wasn't very noticeable.
Now that you mention it, my daughters custom is much loader then mine.
Hers is newer (mine is a few years old), maybe they get quieter as they wear a bit?
The reason they were installed was to prevent paint/dirt from getting into the bolt area.
I would rather clean a tippy @home, then in the field
