[ninjapig]

Do any one no, or has any one bin able to make or form an underseat exhaust for a 99 zx9?????

 

[Masta Squidge]

It involves hacking up the entire subframe, and you still have to find a way to route the exhaust pipe.

It makes for a hot seat, and a raised center of gravity. There is a reason they don't run them on bikes from the factory any more.