Read, research, read, research.
I can not recommend highly or stress enough the benefits of learning the basics of exhaust flow.
Asking others is one thing, even if they know what they are talking about, it’s whether it suits your intended working environment/application.
There is so much horsepower/torque tapped in the exhaust flow that if it’s not optimal it wastes to an extent internal mods.
There is a wealth of reading out there.