Removing the DB killers from the stock exhaust of the Royal Enfield Continental GT 650 is possible, but there are a few things to consider before doing so. The first is that it will increase the sound from the exhaust, so if you do decide to remove them make sure that it is done legally. The second is that it can negatively affect the performance of the bike, so it's important to get the tuning done by a professional if you go this route. Ultimately, it's best to weigh the pros and cons before making any decisions.