Mood: My Jota goes rumpety rump! & I have my wife exactly where she wants me!
I have just fitted a C/F air box and up graded my old JHP filter with his new "K&N" style under tank filter system, it seems ok and as JHP have a reputation to uphold I can only think that maybee they have done their sums as to wheather these work ok.
Have a loom on their web site for a piccy of them fitted to a 998.