I put a K&N intake in my Ford Lightning before I put in by BORLA Cat-Back and it never bogged down. Its probably a Dodge thing. lol It shouldn't do that. The EFI should automatically adjust to the K&N intake becuase its gettting more air.
The 1st day I put the BORLA Cat-Back on the truck didnt run so smooth. After about a day of driving the truck adjusted itself and it ran alot better in the low end.
thats what i think. i just put one in my Tundra and its fine. it has a lil more power too.