At different times I've run across discussions regarding the intake to the plenum as another consideration. To that end, the surface of that "accordion" pipe between the air horn and the filter housing...always troubled me. Everywhere else, runners sweep this way and that, turns follow careful radii, and attention is paid to keep the surfaces relatively smooth. And, then there is that convoluted, accordion-like snorkel...
I wish I had "before and after" data; "before" being the stock tube (or maybe allowing wire hoops in the convolutions to prevent the tube from collapsing) and after with a sleeve inserted in the tube, not only to keep it from collapsing (what they are usually used for), but to see if straightening out the flow has some tangible value.
In talking with Pete, he removed his snorkel for racing one time, and is convinced it slowed him down. Reinstalling the tubing picked the performance back up (he says-and he races a lot).
Just wondering what the rest of the Brotherhood's experiences/comments might be..
P.