Funny, J; I am about to install a Dinan intake myself. Take a look that the elbow itself. The Dinan one is far more open than the OEM one (for better or worse).
I actually like the Dinan intake for several reasons: A clamping filter instead of one held in place by compression, metal fittings at the PCV hose, a re-usable filter, and sound. Most of all, I wanted mine to blend into the plenum and air box instead of the gloss black OEM elbow, so I hit it with a wrinkle-black look.