K tech filter

Is it a panel filter or a cone? As if it's a panel it's unlikely that the sound will change at all
 
I've just looked on k tec website at the filter and mine is very dirty haha :/ will it make any difference or just make the car slower?
 
might restrict airflow a bit, and could suck some crap into the engine i guess, might be worth asking ktec if they are washable and can be re oiled?