Hello.

​​​​​​What is the size from original (directly) input and output outer diameter of resonator please ?

Thank's you very much!

Hello,

From my understanding, the inlet and outlet diameters are the same, and are equal to around 2 1/4 inches (57mm). To be completely sure, you can get a caliper and measure it.

Hope this helps and best of luck!

Thanks for your help !!!