The price you pay for the extra performance and light weight of aftermarket-exhaust liberty is internal vigilance. You’ll need to repack your muffler with new, ahh, packing material now and then. Unlike your typical stock exhaust, which is built to last a lifetime with muffler baffles made of steel and other solid metals, most performance pipes are packed with fiberglass-like packing stuff that uses itself up over time, reducing performance as it gradually blows out the tailpipe, and producing more noise. I remember this full-race Akrapovic system being surprisingly quiet when we put it on here, how long has it been? About five years ago. Lately it seems like it’s gotten considerably louder, but that could be because all the new bikes I bring home seem to be getting progressively quieter? Anyway, repacking this thing is a good way to see how it’s done.