I just ordered a 22mm with manifold with pulse, I also got the medium weight valve springs. and a pump, I have not yet ordered a filter, I think I can find a nice durable springy uni filter at a dirt bike shop. Only question I have is will the filter that comes fits on the AGK adaptor for the stock carb fit on a mikuni 22? that is why I didnt order the filter, that and I wann look for a pod filter or find a hotrod velocity stack. I also havent came across a stack yet either. (not one just to mount a filter, A big offensive looking airhorn style with a screen)