Quote:
         
 
          
          
            
             
             
               Originally Posted by 
               Kev 
                
               
             
              You must try & fit a stage 2 filter before going to the dyno, as this filter offers the most power for the price.
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         Not possible I'm afraid
        

 DNA stage 2's do not fit with the Pipercross filters. Hence my PiperX sitting on my desk right now and me buying a new K&N filter.