Give this a search. I'm wondering what the difference in the CAT 3 (Hurrican HO) and the CAT X will be internally, and if there would even be the possibility to upgrade to it. Probably not, as I think I read it is for off-road use. Never the less, I'm tired of all the interest in V8 continuation and bitching about the sound of the straight 6. "oh, I just gotta have that V8 sound" Pffft. A straight six that "easily" holds 1000hp would help silence some more of the V8 bumpkins. Drivetrain/trans would be yet another issue. I wonder when Hennessy gets a hold of an RHO, what direction they will go.