Just installed radix and am having problems:

I have a certain point a to point b spot on the highway that I gauge my mods and increased performance and the truck is about 3 mph slower than it was before the charger. I had a code pop up today(bank 1 fuel trim too lean) and the idle goes up and down rapidly. This leads me to believe that maybe one of the gaskets in between the heads and blower got snagged and did not seal...?? Or could there be another problem?