GrimmSpeed 08+ WRX/STi AOS - Manual (Page 7)

15. Remove white connector from hose end and reconnect it to the tee. Plug the hose that
had the connector with supplied 1/2" hose plug (see arrow). Connect longer supplied 3/8" PCV
line into rotated crankcase tee.
16. Using supplier ½” hose, place ½” hose onto the white hose connector and bring hose to
one of the bottom ports on the AOS. Skip to step 19.
STEPS 17-18 are for 2009+ WRX ONLY
17. Locate crankcase breather port Tee near the turbo. Pull white sensor off of Tee.