I have a stock 2018 SCREW and installed the 91 octane MPT tune, very satisfied. It really wakes up the truck and the transmission is much improved. They walked me through the process and answered all my questions, good customer service.
I had the same problem. The rubber boot at the front of the air intake that goes to the filter housing came loose and sucked into the tube that feeds the box were the filter is, blocking the air flow. I had to pull it out and replace the two plastic rivets that hold it in place