OH, 
  so it should then be possible to Keep the K&N  and use some sort of tool to remap the ECU to use a bit More fuel then the ECU thinks it shold.  (so the k & n fools the MAF sensor, but then you compensate for this by just telling the ecu to run a bit richer then the ECU  'thinks' it should)   

   then i get to hear the cool (stock ) subaru noises,  but i also keep the engine cooler.    
  and i screw mother nature and my fuel economy goes down a bit more .  
  we are all happy ...   except mother nature ...  

   and people who hate the sounds of turbo and BOV noises. 
   (on my stock bov, don't see spending money just for a different sound, someone  @ a car shop told me you can setup the stock bov to blow off to the atmosphere  that a tangent though ) 
  Thanks 
 
     don't suppose anyone rents the services of those tunner tools or do you have go and buy some fancy thing ?  i won't know what to do with it , and i don't want to hurt the car.     Don't suppose subaru would be happy and willing to just remap it for me ?   not a chance  oh , okay then ... 

  lol