Your 2000 will have them....or should. One on the pass rear (toward rear of car) that is for the one 1 check valve on the vac system. The other will be front driver that goes to the fuel rail. You can see them in this picture. Anything prior to 00 I can't say for sure, never messed with the 2.5's. I know this is what is needed on 00-03 cause I have replaced them myself in the past 60 days.
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