solid fixture here in the forum
They do plug up easy with Mud K&N we found that out dirt track racing in past.Now this is just my opinion, but yes I think an oil soaked element has more restriction than a paper element. I could be wrong...
That is the same filter base I use.
I tacked a piece of stove pipe in the center of that plate , then siliconed two filters on top of each other so they would clear the top of the pipe.
Kinda like a velocity stack, inside of the filters.
I feel that it straightens the air before it gets to the carb.
Have to use an Allstar foam cover around the K&N.