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These are the "O" rings for the top of the fuel injectors to seal the fuel injector to fuel rails. These usually come with a set of New fuel injectors. If you are re-installing a fuel injector it is not recommended to re-use the "O" rings. Because these "O" rings come into contact with the fuel and vapor they are manufactured with a special material. These will not degrade in a short time like similar size "O" rings which you may find at a hardware store.
Fits all 2002-2005 WRX and 2007 STi with Top feed injectors. Individual fuel injector "O" ring
Set of (4) four injector "O" rings
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