Tech Tip: This part is the Breather for the Rear Differential and the Transfer Case for the EVO 8 and it is the Breather for the Transfer Case for the EVO 9.
So your girlfriend took your EVO to the store for some milk and decided to do a 7,000 RPM clutch dump and smoked your transfer case. We carry these brand new OEM EVO transfer cases to fix this problem. This is the same part that came in your EVO from the factory.