Expansion chamber.. How exactly does it work?

[Oddzball]

I was curious, think ing about making my wn exhaust actally, i have a welder.. but was wondering if i should just make a straight up pipe or something more specific?

How is the expansion chamber exhausts designed that mae them so good?

 

[srdavo]

https://motoredbikes.com/threads/exhaust-expansion-chambers-in-laymans-terms-how-it-works.7823/

https://motoredbikes.com/threads/how-does-an-expansion-chamber-work.5351/