I've used both the NAPA stat and the Cummins stat. The NAPA stat is just a regular looking stat. The Cummins one is much beefier and from what I have read seem to last quite a bit longer. There are lots of people who have had good luck with the NAPA stat and others will only use the Cummins stat. My local shop only will install the Cummins version and they say the anything else is just not built for this motor. The Cummins stat has a big runner ring that goes around it to help with the vibrations of this motor. Either way I think your OK. Right now I have a Cummins stat in my rig and have no issues. Pick one and run it.