Well, I have the Volant Intake, and I'm at the point where the filter that came with the Volant (a cotton gauze that is far inferior to even some of the worst cotton gauze filters) is about ready to retire...I thought, no big deal, I'll get the dimensions and find another one to replace it...hmmm...not as easy I had thought. It has a 4 1/2 inch opening, a 5 7/8 inch filter base diameter, 5/8 inch centered opening flange, a 4 1/2 inch filter top diameter, and it's 5 inches long. SO I start looking...first place I look is ITG..since I'd rather have a foam filter than the cotton gauze...they don't have anything that'll fit. Really limited selection actually. So I head to K&N, they have one that will fit...except it has a TITANIUM end cap! Why in the same blue hill would I want a TITANIUM end cap...not only do I not wan't one, It won't work anyways, since there has to be some degree of flexibility in the end cap, just so I can get the damn thing into the Volant box...Anyone else have any ideas?