What happens when you take off a stock muffler end?

Removing a stock muffler end can increase exhaust flow, which may lead to improved engine performance and a more aggressive sound. However, it can also result in a louder exhaust note, which may not be street-legal in some areas. Additionally, removing the muffler can affect back pressure, potentially impacting fuel efficiency and engine tuning. It's important to consider local regulations and potential effects on emissions when making such modifications.