I removed it when I installed my Takeda SRI. Than again, I removed the entire stock air box. :lol:

 

i took mine out when i put in a k&n drop in and moved my inlet tube down to the lower grill. i just lightly drilled the plastic tabs/rivits holding it in.

 

I did not remove it when i relocated the tube or when i removed the tube entirely. Why remove extra filter? It will go the way of the dodo bird when i eventually get the Takeda intake as Jim has.

 

im pretty sure i removed it since i removed the whole intake for a weapon r with ram air. dont remember seeing a second filter tho

 

it's not for filtering air coming into the airbox, it keeps vapors from escaping.

 

Supposedly.
There's a big argument about that somewhere.

 

i would think it is a restriction. i don't know for sure. i removed it cause everybody that posted about doing there own cold air intake removed it.

 

I sent forced air through the one I pulled from my RAV and Matrix with my air compressor, it is most definitely a restriction.

 

That actually might be valid if your car could draw in air as fast at the same pressure your compressor delivers. At that pressure the compressors own hose is also a restriction. Given the naturally aspirated nature of the engine it can only intake so much air due to the throttle body plate/opening...there is the real restriction if there has to be one.

Unless someone can put up a dyno showing that there is an increase in power from removing it, I still believe the stock system can provide more air than the engine can consume. Are there valid dynos showing that even an aftermarket intake provides more power over stock from TN members?

 

somebody dynod a weapon r secret weapon and gained 6hp. if you search weapon r you'll find it.