| Air Box Filters.
Some advioce please chaps!
I am going to replace the undertank filter system on my 998s with to K&N look a like filters.
Question: As a normal filter passes air from the outside to the inside then to the carb/injection, how /what is the efficiency like if the air is actuallt blown through the filter in reverse ie air enters the filter from the inside and gets blown to the outside ,
does this make sense? | 
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