I had the original MTZs on a 1995 dodge 2500 12 valve and they were awesome. As far as noise goes, I couldnt hear them over the cummins. But as far as performance, they were great in snow over 3" and in the mud they dug and pulled me out of places I should not have been. And this truck was open diff front and rear, just basic 4x4 with no articulation. Once the duratracs are worn down, MTZs will be my next set.