There are actually 2 different valve covers - one that says "Mitsubishi 24V V6" as yours is, which I believe is for 99-01(?), with 02(?)-03 engines having "3.0L V6 24 VALVE".
If I recall correctly, the change in valve cover was mainly to keep it generic for production purposes as the same 6G72 engine was also being used for the Dodge Stratus R/T.
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