My celi came equipped with a pipercross cone filter. Looks about the same as a K&N except it is covered in a "foam" material (im guessing to prevent water from getting in).

But compared to the K&N filter i had on my old celi, i can hardly hear any noise at all from this one. Except from the hissing idle sound, i cant hear that gurgling effect the K&N filter gives.

This normal for pipercross filters or is something wrong?