cut the cat off and then using a large drillbit gut the materil out of it so that its a strait through path to the muffler and then have the cat welded back ont eh the exhaust so that it looks like it was never taken off.
Maybe buy the shorter OEM slip on from a 06-07 model, like this:
It might be slightly better flowing (looks to be straight through rather then chanbered like ours) and maybe a little louder then the current 08-09 models. Well at least it sounded louder on a friend's 07' 600.
can you swap out the "muffler" from the 06-07 onto the 08 or is it connected to the cat on the 06-07?
Actually after looking at my buddies K7 600 it looks like the can is welded to the cat. You would still have to swap out the header for the complete install or cut the 08 cat out and weld this assembly in.
It comes as a assembly like this i believe:
Last edited by 08 GSX-R750; 12-20-2008 at 07:37 PM.