Someone on another forum was a tester for the 3.7L Hypertech product. I'm assuming it is all recent development, because most sites selling the Max Energy don't even list the 3.7 (or the Hemi for that matter)... just the 4.7. However, when You update the PROGRAMMER through the software given to you - you can select 3.7L V6 Jeep. Hypertech also lists the 3.7 for the Jeep and Dodge on their website.