Hi out there,
i have a technical Question an i hope i will find the right words for it...

I have a old muffler, which has seen some better times. So i decides to make some test, how to get a better sound out of it.

But before i do this, it is essential for me to know, if a 911-Motor lost some engine power or torque, when there is more less backpressure from the exhaust stream???

Does anybody know this?

Best regards
Winnie