My exhaust is loud and extrememly annoying. I wa s told that this is a normal problem with p11 exhausts,a nd they often need replacements. I was looking to purchase a new exhaust and I found this one online. But before purchasing I have a few questions. First its really cheap 19.99 (supposedly 250 retail) do you think this is a reliable product? ONce installed do you think this will handle the problem or do I need other attachments?