So i already installed my set of used injectors and i was looking at some pics and something caught my attention. Do i need O'rings for the nozzle(outlet side) I have 1a and 2b done but left the last one, is it necessary??




taken from the Greddy the manual =

１１．Injectors（S2000 Use only 550cc×4、O-ring Large×8、O-ring Small×4、Spacer×5） １ｓｅｔ

１２．Injector Harness ４



photo is from boostftw