Ok guys.... what's the difference between the two?? I've got the ISO Thermal MREV + on my G. I know that the lower plenum that I installed, the 2 front runners, the top of the runners is shaved off to get more air into the cylinders. What's new on the MREV2 ?? Are the cylinder ports larger now ?? Also, we are talking about the lower plenum right..??

 

Yes, we are speaking of the same lower plenum. With all due respect to Tony, until he decides to fully devulge the info on the MREV2 . . . All I can say is that the MREV2 has had more work performed on it than my old MREV+.