i have the CF TB down to the catalytic converter and its quite deep. my friend put it on when he had it.. I think it has been on close to 8k miles. sounds really good to me.

 

All exhausts will change notes over time as they get some life in them. That's what exhaust repack kits are for. Don't let that change your buying decision.

I have a TwoBros repack kit if anyone wants to buy it - it's just taking up space in my house.

 

I bought my bike with a cf tb....it sounds amazing. The bike has 25k on it, and I'm sure the exhaust has been on for a while...it shows some signs of age, but still sounds great....I would save up a little more and get the tb, its worth it.

 

i have a two brother on my zx10r... and its soooo loud that it would be ok the be quieter haha . i need to wear earplug :S

 

are they all the same? I might be interested...