Before we even talk about how the thing drives, it's worth noting the almost ridiculous level of build quality on this conversion. If you didn't know better, you'd think the HEMI was original equipment; in fact, thanks to AEV's connections to Chrysler, it's built using a lot of the same suppliers Chrysler uses. The wiring harness comes pre-tested and everything plugs up to the point that if you patch in a technician's scanner, it'll read as a Wrangler with a HEMI. It's literally as good as if it came from the factory. But what the HEMI Wrangler is all about is performance, and let's get one thing out of the way right off the bat: The price of admission for the AEV conversion kit is worth the exhaust note alone. Firing up that big V8 fills the little cabin with intoxicating levels of awesomeness. Out on the asphalt, the big bad JT actually rides really well for what is in essence a purpose-built rock crawler. That's not to say anyone will mistake it for a sports car, but it certainly will get you where you're going quickly. Since this is Michigan and not Moab, the most off-roading we could do in our short test drive involved some back-country dirt roads — the kind that would swallow a passenger car into its ruts and holes, but only rough enough to test the assembly quality of a rock hopper and not much more. Up against this measly test, the Wrangler didn't even flinch, providing an almost disturbingly smooth ride. Even with the huge tires, the excellent turning radius found on a stock Wrangler is unaffected. Ride and drive, exhaust note, nice leather seats — that stuff is all well and good, but you know what's really fun? Four-wheel dirt burnouts. Not that we did any of those, or dirt road brake stands. We'd never do stuff like that. But if we did, we would probably report AEV's HEMI V8 conversion turns a stock Wrangler Rubicon, which is pretty good on it's own, into a fire-breathing, mud-spitting, swaggering, snorting, off-road superstar.