How can you make your mufflers louder without changing mufflers?

To make your mufflers louder without replacing them, you can start by removing or modifying the baffles inside the muffler, which reduces sound dampening. Additionally, you can replace the stock exhaust tips with larger or more aggressive ones that can amplify the sound. Installing a high-flow catalytic converter or removing it altogether (where legal) can also increase exhaust flow and sound volume. Finally, ensuring that your exhaust system is free from leaks can help maintain a louder, more aggressive tone.