It's my understanding that PSI is doing the complete engine assembly, top to bottom. So it's not a Mitsu built engine. The blocks are cast by Mistubishi. Where all the other components come from and how much is shared with the previous industrial version, I don't know. I was assured that much had been re-engineering though.

I've been offered a tour of the PSI facility (located in the Chicago area) to see the process, but I haven't accepted the invite. No desire to be in Chicago this time of year. Told them to call me during baseball season when the Cardinals are in town. LOL

Anyway, I haven't ordered my first unit yet with the new engine. Still waiting for the bean counters to give me the green light. Then I'm 14 weeks out from delivery. My local dealer has taken delivery of a couple though, and when then next ones arrive, I'm supposed to be given the opportunity to look them over.