dmcc.
I just added a couple extra gasket to the reed cage assembly. Use yamabond between the gaskets to ensure a tight fit. Not necessary but a nice touch.
You can also add an extra exhaust gasket to the pipe side as well.
A lot cheaper and you can always add/remove gaskets to tune.
There was a noticable gain in bottom end grunt on my 200.A very noticable gain.
But then again,,,,I'm one of those riders who adjust the air screw 1/16 turn at a time(several time a day) to get the best performance.
best of luck
Joe