Skettime

Major stress here people. any help would be appreciated. I installed the AFE to my beautiful blacked out 2020 Z71 with the 6.0 yesterday and had the same issue with the pipe being too big on one end. I ended up cutting more slots at the end and it worked great but I had an exhaust leak today. Well, I now have a much bigger issue though and I hope it’s not related. I drove the truck about 60 miles today. I was going to drive to town and get it welded but I never made it there. All of a sudden the truck was throwing codes and running horribly. For some reason the engine light started blinking as well as the brake warning lights, then the truck stalled a few times on me while throwing codes. The codes thrown were P0304 -cylinder 4 misfire, P25A2 - DTC definition not found and P0106 - manifold absolute pressure. Could these be related? I guess I’ll find out if the warranty is still good on my new truck with only 700 miles on it by Monday. Has anyone had similar issues? I’m totally stressed here.