Want to get a better MPG and increase airflow? Maybe you need to change your muffler bearing.
If your wife, girlfriend or that one friend you have that knows nothing about cars is having trouble with their exhaust, you might want to show them this. Muffler bearings can go out from time to time and it’s always good to know how to change them. ChrisFix made this great how to video and he also is the guy who made this great video showing you how to change your blinker fluid.