Not sure where you live but this is the law where I am . 20128 . Exhaust system and emissions control devices . a No person shall drive a motor vehicle on a highway unless such motor vehicle is equipped with a muffler , or other exhaust system of the type installed at the time of manufacture , in good working order and in constant operation to prevent excessive or unusual noise , annoying smoke and smoke screens . b It shall be unlawful to use a muffler cutout on any motor vehicle upon a highway . <| sep |> I don ' t think that ' s a good idea because that would just promote playing for your own grades so you can disenchant those tokens for either skins or champions . The grading system is easily abused by just AFK farming in an offrole and at least now people stop playing for their own scores after they get their mastery on their favourite champions .