It's a Tahoe frame with a GM V6 engine. And from what I saw and heard on C&D, it out performs all other SUV's except the original Hummer. It's supposed to be a soccer-mom SUV, thats why they built it. Also, the H1 may have been able to take a rocket but it is also double the price. I wasn't sold until I saw it and all it's features. I'd buy one.