I did it as a test before installing an APR wing. It's a pain in the ass and don't recommend it unless your have the patience and willingness to do a lot of cutting.
Yeah I am just assuming its because they don't want to open a new box and mess with it. The 2 local dealers I have tried calling don't keep any of the wings in stock so they would have to order one. And they wont order me one unless I pay xD
Sadly I have already tried that and they said there wasn't anything they could do because they would need to open a new parts box. Funny enough College Hills were the first that I tried asking.
I could be mistaken but i'm pretty sure that intake manifold is designed to use their secondary fuel rail for adding port injection to our motors. You would need to find a way to plug those holes because I dont think they provide plugs.
I haven't seen any available yet as well. Other than Racebred I would bet on APR or 9LR to come out with kits in the near future. Talking to Racebred I do know they plan on it but i'm still waiting on an answer for time frame.
Can't speak about the downpipe specifically but I did notice PRL axed a bunch of their own products from the website. So I really don't know what is going on with them.