The effect of rear mufflers on torque curve

[Karabiner98k]

Does anyone here have any article in which torque curves are shown before and after installing supersprint rear mufflers in a car?
I want to know the effect of rear mufflers alone. (without headers, center, ......)
Thanks for your answers.

 

[Giannis]

Hmm, I am sure that the outcome, the difference between the two diagrams if I may, will be different based on the car and type of engine used each time. Installing a SuperSprint rear muffler will have a different outcome in a N/A than a turbocharged engine, to begin with.

What exactly do you have in mind?

 

[Karabiner98k]

will be different based on the car and type of engine used each time

Yes, i know but it doesn't matter a lot.
I prefer a test with a medium family sedan with a range of 1.6 to 2.0 engine. (for example a Peugeot 407 2.0 16V)
Anything is appreciated.

 

[Giannis]

Ι don't have anything in my archive, sadly. I hope there are some members that do, though!

 

[K-A]

I know that I had a V8 N/A car once and took the mufflers off, the low end torque had diminished greatly. My friend did the same on his W2220 S500 and noted a big loss of low-end torque as well. Not to mention gas mileage went down quite a bit.