Diameter of the stock exhaust 3.0si?

[Carteen]

Hello, everyone.
I have decided to remove the mid-muffler (see picture) on my Coupé 3.0si, i.e. resonator delete. I will replace this muffler with straight pipes instead.
Does anyone know the diameter (millimetres) of the exhaust system so that I can buy the right replacement pipes?

 

[TriggerFish]

The previous owner of my E86 3.0si did a backbox delete. I have this waiting to go back on, and it's between 47 and 48mm outside, 44mm inside, 2mm pipe thickness.

 

[Carteen]

@TriggerFish Thank you very much for the help