Termis: Full or asymetrical
 

How do I know what I've got.?
My new 999 has two separate pipes going to the end box.
The back cylinder pipe takes a big twist around the shock if thats a clue, and the box of bits from the original system is pipe central.
Ta

Trace the two pipes from the muffler all the way back to the engine cylinders. If each pipe is completely independant from the muffler to it's respective cylinder and doesn't merge with the other pipe, it's a half system.

Sounds like you have the assymetrical system.:cool:

yep it does

Ask Gus :D