Installation Manual

INSTALLATION INSTRUCTIONS
Part Number 33-2232
This Filter Fits: SEE CURRENT CATALOG FOR CURRENT LISTINGS
Congratulations, you have purchased the fi nest air fi lter that money can buy. With proper care, this fi lter will last 1 million miles or more.
This fi lter is a direct replacement for the stock air fi lter, and no modifi cations will be required. However the following procedure MUST
be followed to ensure a proper fi t and seal of the K&N Air Filter.
1. Carefully remove the throttle cable from the retainer located on the air intake tube. (Fig 1)
2. Loosen the hose clamp that connects the air intake tube to the airbox lid and the hose clamp that connects the air intake tube to
the air intake duct. (Fig 1)
3. Carefully disconnect the air intake tube from the airbox lid and air intake duct, then remove the air intake tube from the vehicle.
4. Carefully disconnect the mass air sensor electrical connector from the mass air sensor. (Fig 1)
5. Remove the mass air sensor wire harness from the retainer on the airbox lid. (Fig 1)
6. Remove the two coolant hoses from the four retainers on the airbox lid. (Fig.1)
NOTE: DO NOT DISCONNECT COOLANT HOSES AND DO NOT ATTEMPT REMOVAL FROM RETAINERS WHILE
COOLANT IS HOT OR YOU MAY BE SEVERELY BURNED.
7. Remove the two bolts that secure the airbox to the frame of the vehicle, the airbox is shown removed from vehicle for clarity. (Fig 2)
8. Carefully pull the airbox assembly towards the engine to release the retaining grommet and fresh air inlet duct and remove the
airbox from the vehicle.
9. Remove the stock air fi lter and install the K&N Air Filter into the airbox base.
10. While holding the airbox lid at a 65 degree angle to the airbox base, engage the two male tabs of the airbox lid into the two
female slots of the airbox base. (Fig 3)
11. Fasten the two airbox clips.
12. Re-install the airbox back into the vehicle in reverse order of removal.
13. Re-install the two coolant hoses into the four retainers on the airbox lid.
14. Re-install the mass air sensor wire loom into the retainer on the airbox lid.
15. Re-connect the mass air sensor electrical connector.
16. Re-install the intake tube and tighten the two hose clamps.
17. Re-install the throttle cable into the retainer on the air intake tube.
THESE INSTRUCTIONS MUST BE FOLLOWED EVERY TIME THE FILTER IS SERVICED, OTHERWISE THE
FILTER MAY NOT SEAL, AND DAMAGE TO THE ENGINE COULD RESULT.
Installation Instructions for Subaru WRX
Installation instructions for Subaru Outback 3.0L
Installation Instructions for Subaru Outback 3.0L
1. Loosen hose clamp that connects the air intake tube to the airbox lid and the hose clamp that connects the air intake tube to the
air intake duct. (Fig 1)
2. Carefully disconnect the wire harness from the wire retainer that is on the air intake tube. (Fig 1)
3. Carefully disconnect the air intake tube from the airbox lid and air intake duct, then remove the air intake tube from the vehicle.
4. Remove the two bolts that secure the airbox assembly to the frame of the vehicle, the airbox is shown removed from vehicle for
clarity. (Fig 2)
5. Remove the power steering return hose from the retainer that is on the airbox base. (Fig 1)
6. Carefully pull the airbox assembly towards the engine to release the retaining grommet and fresh air inlet duct and remove the
airbox from the vehicle.
7. Remove the stock air fi lter from the airbox and install the K&N Air Filter into the airbox base.
Fig. 2
Fig. 1 Fig. 3