S15 valve assembly fuel, do we need it?

[VStarNinja]

Hi guys, do we need this valve assembly fuel part number 17065n? I just rang the dealers and they reckon its been discontinued since 2014, i think its just a pressure release valve idk, i cant upload a picture from my phone please see link

https://nissan.epc-data.com/silvia/s15/4127-sr20det/engine/172/

[gaz_moose]

could you not just get one out of an s14?

[jedi03]

https://www.bing.com/search?q=valve+assembly+fuel+part+number+17065n&src=IE-SearchBox&FORM=IENAE2