Replacing the standard filter with Blitz Filter is pretty straight forward. Remove all the clips off the Air Filter, and the snokle for the intake.
Remove the Top Lid of the filter and screwpoints holding it down.
Now the tricky /scratch your head part ? Took me a while to figure this out as I didnt want to break anything. Basically once you remove all the bolts that you can see. Pull the filter up, it will require some force.
There is two grommets holding the filter in place.