https://fastcarvideo.net/how-to-complete-a-muffler-installation/

A properly functioning muffler fulfills two major functions. It helps reduce engine noise, and also keeps the back pressure under control. Therefore, a damaged or worn-out muffler is often unable to perform one or both duties.
Then follow the directions below to discover how to put in an exhaust Muffler.
1. Before you begin removing your old muffler, park your vehicle on a level surface.
2. Connect the battery to the car by loosening the bolt which holds it to the negative end. It will stop the car from moving while you are working to fix it.
3. Jack is the car that will let you work underneath it.
4. Apply the oil that penetrates to soak up any bolts. This will make it easier for the bolts to break loose.
5. Use a socket to loosen the nuts that hold the muffler.
6. Take the exhaust pipe and muffler apart.
To complete the muffler installation take a look at the video above. It offers a comprehensive guide on all the installation steps.
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