370Z Purist explained the changes quite well.
The overall aesthetic is improved as well.
Mandrel bending is nice because it eliminates any seams, smooths the path of the airflow(with the aluminum, the seams are so tight that this is only a mild improvement, if any), and makes for a more appealing product to some. Actually, it will be a little cheaper for me to have them mandrel bent in quantity, then fab each kit on my own. For now I will be getting a few sets done here then I will have a place mandrel bend a run for me. I like to have a few sets out there before they become a stocking item. That way if there is any issues or revisions required, they can be addressed before final run. The quality will be there for both.
We are using a K/N filter at this time, and they have a small amount of oil in the filter, but it does not go into the piping and I do not suggest oiling the filter any more after purchase.
The intake does require trimming the front plastic area. It will require the same install as the Stillen unit. We will have instructions up very soon. the trimming is minor, and does not have a negative effect on the front end. Our car is tracked very hard and daily driven, and there has been no cause for concern.
The piping will go over the AC lines, however there is a fair amount of play in the fitment, and we will provide a piece of silicone to protect the AC lines. After 1500miles, the first set has shown no signs of wear.
I hope this helps a bit. I will get you final pics in an hour or two, I have to finish welding. Pics to follow.
Cheers,
John