Quickie on trumpets if I may.
I have a dilemma, I have ordered a new pipercross air filter element and I have to decide if I want my long air filter box trumpet in or out.
It is currently out, but I have noticed no real difference in performance. I have read a post of two quoting it as being important to air flow characteristics, however, as I am a total thicket on this type of science, should it be put back in, or kept out. I intend to get a GTA intake pipe to go with my funky filter. I don't want to sound like a Kev!
Any guidance or experience please.