I just bought the compressor filter for it refering to http://www.pbase.com/rsrock/oil_catch_can, and i was wondering. on the filter it says in and the other side out. Does it matter which one goes to either side? and if it does which one goes to what side? Thanks in advance

 

I did this on my Cobalt SS and it worked great. I installed it so that IN came from the valve cover and OUT faced the intake.