I have a 06 cbr 1000 exhaust I was wondering if it would bolt onto a 06 CBR 600

 

undertail or slip on?

 

It's a yoshimara slip on I bought the hyper flo dual set up and my friend wants the old pipe for his 600

 

Should slip straight on then, use his mid-pipe. But yeah it will be ok on the 600.

 

Good deal thanks a lot

 

No 100% true.
You would need to make sure the mid-pipes are the same Diameter.
And you might have to fabricate a bracket to hold the can to the mid-pipe. and if it is a factory exhaust on an F4i the can is welded to the mid-pipe so you couldn't just slip the new can on.
Is the 1000cc an undertail exhaust?

Best thing to do is just try and see if it fits