Sorry if I ask too many noob questions but I enjoy the breadth of knowledge here. When I bought the R1100S used, the seller told me the loud note of the aftermarket exhaust was a plus as people will hear me coming. (kinda like Harley loud pipe guys proclaim the safety factor). He did not specify the brand and implied the original owner put them on. I am now finding the noise annoying and ride with my musicians earplugs always. When I search there is Remus stainless, which would be a durability plus but I don't know how to identify any aftermarket label. There is strangely a "P1100S" on the metal of the pipe about 18"" from the end of the exhaust under the seat. I do not see any bluing of chrome like where the pipes come out of the head. or any rust so might be stainless. Frankly I love the peaceful sound of stock Beemers going by when I am walking, and can call them out approaching before I even see them. But if I have a horsepower upgrade or a no rust upgrade maybe I should just keep wearing the earplugs?