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Old 03-12-2003, 10:20 PM   #1
Scooby Newbie
Member#: 24977
Join Date: Sep 2002
Location: Waterford, Mi
2003 WRX

Default STi injector o-ring question

I know I saw a post on this a while back, but I can't seem to find it.

When installing STi injectors are you supposed to use the STi o-rings or the stock injector's o-rings?

To further muddy the waters I'm installing a Perrin fuel rail too.

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Old 03-12-2003, 10:23 PM   #2
Quick WRX
Scooby Newbie
Member#: 19689
Join Date: Jun 2002
Location: Dana Point
2002 GDA TXS stg 4+
280 whp


The STi injectors should have a O-ring on them, on the top. You re use the thick foam ring that go's between the intake manifold and the injector.
Quick WRX is offline   Reply With Quote
Old 03-13-2003, 01:20 AM   #3
Scooby Specialist
Member#: 16350
Join Date: Mar 2002
Chapter/Region: MAIC
Location: Annapolis MD
B8.5 Audi S4


Yeah. New STi injectors do not come with the lower O-ring thingie. You will see what we are talking about when you actually do the install.
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