So I put a custom exhaust on my bike that I had built and put this air filter on. I was a little afraid when I had first started the bike back up because it did not quite sound the way I wanted it to. But once the bike warmed up I could not have been happier with the result. She runs great and feels like there may be a little extra kick in her step, although this could just be from my own excitement. The product fit better than the stock filter and the build quality blew it out of the park.