Our HEMI category is dedicated to the 5.7, 6.1, 6.2, and 6.4 HEMI engines found in everything from the Challenger Hellcat to Ram 3500 trucks. We have endless articles on the Chrysler HEMI, so we also have the categories broken down into each specific engine. Below you’ll find content including 5.7 & 6.4 HEMI upgrade guides, MDS problems, and tons more.