did we all see mine, some one said it as kinda small, what was your reasoning on that???
i would say the elbow with all krincles in it creates alot of turbulance so thats just one that i can think of.

 

Yes ... restriction is usually a size and shape factor, bigger with less variation in sizes and bends = better typically. Compare the black snorkle portion to the actual airbox inlet... try running by breathing through a drinking straw as an example.
Also any turbulence would be fairly subdued by the air filter.
mar3 posted pics of his less restrictive ducted air intake.. 4" all the way

 

ahh, ille try something else later.