i was wondering how many mm is the comptech exhaust?

thanks

 

"The cat-back exhaust starts out with a 2.5-inch Y-pipe with resonator, which then branches out to two 2.25-inch stainless muffler pipes. The tips measure 2.5 inches across and are also constructed from stainless steel"

How many mm is 2.25 inch?

Thanks

 

2.25" is 57.15mm

 

.. so that is smaller then the stock exhaust.??......