We decided to offer this awesome filter as a standalone part, rather than just in our perfromance kit, becuase it's so damn good!  With a 55mm neck, it clamps right up to your stock SR250 Mikuni BS34 carby and offers supperior air filtration and non-restrictive flow into your engine.
 
Using one of these filters will reduce intake flow resistance compared to the stock airbox and will therefor give you a little power boost - meaning you will need to re-jet your carb to suit the new flow dynmics.  This is why we made a carb rebuild/rejet video and blog post, along with suggested jetting settings depending on your set up.  Check it here and here!
 
** 30 Euro Inc. 25% European VAT