Greetings All.....!

Ok...I know this question has been tossed around a bit, but I am hoping to get the latest skinny.......... got an 09 Ultra, 27,000 miles, stock. Recently, I have noticed a "clattering" or "marbles in can" sound from the upper engine. Seems to be most noticeable 2500 rpm range. Thought's?

I have just heard about a product called " Rock-out" and I believe there is another on the market too..........I know this is a difficult question to answer, but are these the answer to my annoying noise problem.....?

As always, thanks for the advice, and be safe
Jet