GrimmSpeed 08+ WRX/STi AOS - Manual (Page 5)

9. Install the 5/8" to 1/2" connector (1) into the passenger side cylinder head hose that you
removed in step 8. Connect a piece of 1/2" hose (2) in the other end of the connector. Route
this hose to the remaining connector on the Tee from step 6. This hose needs to be long
enough so that it will tuck under the intercooler when it is reinstalled. Cut hose and push it
onto the tee. Again, note that 2012 vehicles may have a white plastic flow sensor inline here. It
should be left in the system and you can connect the hose going to the tee directly to it.
STEPS 10-13 ARE FOR LGT. 2008 WRX SKIP TO STEP 14. 2009+ WRX skip to STEP 17
10. Locate crankcase breather port Tee near the turbo. Remove the factory tee by pulling up
on it. There is some resistance but it will come out(you don’t need to take metal clamp off).
Then remove the top 5/8" hose from the top of this factory tee. You will need to plug the 5/8"
hose by pushing supplied 5/8" plug into it.
11. Push the tee back into the factory breather hose. Cut approximately 2" of 5/8" hose and
install it onto the factory tee.
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