NRG Catch Can How-to on a 2005 Subaru STi

A catch can is a small container, that collects oil blown out of the PCV valve or valve cover intake hose (blow-by). The idea is to keep the oil out of the intake, which helps keep the intercooler running at maximum efficiency. This is because there is less oil vapor condensing on the inside of the intercooler. It is necessary to periodically empty the catch can to prevent it from overflowing. Some cans provide a drain for this purpose.

Catch can install and extra supplies used:
5' PCV hose - Auto Zone
(x1) 3/4" hose clamp - Home Depot
(x2) #14 x 1/2" self drilling zinc hex head screws - Home Depot

1. Optional. Remove intercooler and flush with paint thinner (or gasoline if you are rich). Proceed until liquid is clean (or to your liking).
   I had a some oil inside my intercooler after 20,000 miles of driving.
    
2. Bend included bracket at straight end. You may need to test fit the catch can with the bracket screwed on to see how much bending is needed.
   
   
   I relocated my alarm horn because my camber plate screws were not long enough for the OEM bracket.
    
3. Mark holes to be drilled on passenger side strut tower. Use pointed center punch and hammer in center of mark to prevent the drill bit from dancing around when drilling. Use a 13/64" drill bit to make two holes.
    
4. Insert the #14 screw into each hole and start screwing it in to start the threading of the hole.
    
5. Assemble catch can. I flipped the top so the hose barbs are toward the front of the car. I used the larger of the included hose barbs. Use teflon tape on any threads.
    
6. Mount the catch can. Reinstall the intercooler if you removed it.
   
   
   Make sure the fill indicator clears the hard lines and strut tower.

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