Unbreakable plastic flap to go under the rear mudguard , stops all muck getting into the airbox. Longer and better and completely different from the Honda one!
Made by Mitani Japan to the same design as the carbon fibre one, only stronger and...just works! Yes they are expensive, but they do work.
2014 - 2019- All models. (will fit 2009 on but this sits better on new shaped 2014 onwards mudguard)
A customer review - "I reckon riders accept that crap just gets in. Well it doesn’t with this. OEM is 40 odd quid and trick bits is junk... doesn’t take much thinking about!"