Silencer exhaust

First of all, I congratulate everyone's holiday, I want to buy exhaust with a silencer for my peugeot 306 vehicle, but there is something I can think of. In this silencer, some of the exhaust is being closed. What effect does this closing have on the fuel and performance by forcing the exhaust gas from the car?

There are issues about silencerli exos previously opened bro you can find the answer to the problem. Happy holidays to you.

I did not find the subject opened, can you send a link?

actual

A diameter of the original size should remain when fitting the muffler part. You should pay attention to this when buying.

This was the answer I was looking for, thank you very much: D

I'm glad if you could find the answer to the problem, brother.