Sorry if this has been done to death in previous posts. I have just spent a couple of hours looking and haven't found the answer to the following:

Will a PC 111 fit all XT's? I have a 09 XTZ and someone from the board is selling one off (I think) an XTX. Also do they degrade over time?

I have had the stage 1 and 2 filters sat on my bench for the last few weeks whilst I wait for enough spare cash to get a PC. Am I right in thinking that if I fit stage 1 and the new (snorkelless) cover, along with the reducer insert I can run the bike without fueling mods? I'm aware that I will need to fit the PC with stage 2 fitted.

Thanks