Muffler... inlet

[Tiny 34]

Can anyone let me know the size for the stock exhaust of the ER34? wat size is the inlet ? IZIT 3 inch? can anyone help me?

 

[NISMO S-TUNE]

If not mistaken, original is 2" from the extractor to the muffler. But don't bother to alter it into bigger size as it will decrease your power, if you like to have a louder or more aggressive sound, change out the whole system. You can try PM "Semperfi" as he have the whole new complete set of HKS muffler original from Japan for GTT. This might help you to get better HP and more aggressive sound.