Just ordered all the parts from ECS tuning, great customer service. If you by the M54 Oil separator kit, the throttle body gasket in the stage 2 kit, actually isn't the right part number. they do have the right one there (13547504729-from real OEM) and the replaced it in the kit for me and updated my cart. The two gaskets are interchangeable; however, the -729 one is a few bucks cheaper.
if you guys have any advice, or would like to make a trip down to chesapeake to help out, let me know. currently in the car is on ramps and partially taken apart at my parents house waiting on this stuff. didn't see any reason to put it back together until i replaced everything.