This fitting features a 10AN male and a 16.6mm diameter press-in portion.

This aluminum fitting can be used as a weld-in for universal use, or as press-in fitting specifically for the USDM Mitsubishi EVO 8-9 magnesium valve cover.

Press-in installation replaces the PCV valve's bushing, so installation does NOT require valve cover removal. The fitting has extremely close tolerances to make a tight fit.

NOTE:
The JDM EVO 4-9 valve cover uses a different PCV valve and is NOT compatible.