At TST we've been working hard to get the PowerMaxCR ready for the trucks manufactured after June of 2006. Submit your info if you'd like to be contacted when it's done. Please note 5.9 or 6.7. If you can't wait for the extra power, be sure to check out the Smarty's for the 5.9, they will work on the 03-07 5.9 Dodge Cummins.