I neglected to mention mine is supercharged so the extra 5mm will help. I do have to agree with running stock and being a Hemi I do not doubt gains will be minimal and probably with the supercharger it will not be that great as well. BUT knowing it is there will be nice. Plus minus the tool cost it is a free mod. One more note the tb on mine is 78 to 79mm so going to 85mm will deliver more airflow.