2004 Hemi QC with Airaid Intake and MagnaFlow split rear Catback. When I went to these mods I gained on the Low end and alot on the high end. The mid range seems to be lacking. I've asked Airaid and Hypertech for answers but they had none. Try our product and see! I've been considering headers and high flow cat. I'm not convinced of the programmers. Money versus payback. Any help would be appreciated.