I didnt get any instructions with my unit, but got it installed nonetheless. Some tips based on me wasting time.
(1) Slide the Helix + HFPP + bracket + bolts together BEFORE putting the unit in. If you try and put the bracket on after the unit is mounted, it isnt going to work.
(2) There is 1 shorter of the 3 long bolts that holds the Helix + HPFP to the vacuum pump. The longer 2 are for the bolt holes that have the bracket. Pay attention.
(3) If you are still running the plastic cover over the valve cover, you will have to trim part of the plastic off near where the high pressure line connects to the fuel rail.
(4) The harness connection to the LPFP sensor is pretty tight. The junction box wont slide into place under the intake manifold after install. I am going to look at making an extension so things go back together neatly.
(5) The LPFP hard feed line into the HPFP is pretty cramped after putting in the Helix. I had to bend the tip part a little in order to get the threads to smoothly engage on the 17mm nut. I used a deep socket of some type or another and had no issues bending it 10* or so.
(6) The billet vacuum plate comes with longer screws. Use the ones they provided.
(7) When you install the billet vacuum plate, replace the oring. This is the only place I could find for it.
https://www.amazon.com/dp/B076B4JS8Z?psc=1&ref=ppx_yo2ov_dt_b_product_details