I had replaced my intake and put the AMSOIL filter and saw this , if you dismatle the BOX you will see an actuautor valve inside the filter BOX, I beleive it regulates the heat and Air mixture to the intake, thats my 2 cents on this!!
RENNtech Flash/WAGNER IC
VMR710 19"/Execuhitch Hitch/Koni FSD
Soft Ride Bike Rack
Amsoil Cetane Boost Diesel Fuel Additive
Amsoil Diesel Fuel Additive Concentrate