mugen b pipe size?

[CTR_EK9]

does any1 know the mugen twinloop system b pipe size? getting an xforce highflow cat but not sure what size will fit.... can any1 be able to tell what size...

thanks

[90LAN]

2.25 at the front and 2.5 after thr resonator

[EG5]

Just get 2.5 inch cat