We've been keeping tabs on Rhys Millen Racing and their construction of a V8-powered, mid-engine Hyundai Genesis Coupe for the last few weeks. Called the RM460 Genesis Coupe, this car will make its official debut at SEMA in early November, but we've got the first rendering of the exterior right here for ya. As we've mentioned before, the engine is the 4.6-liter Tau V8 normally found under the hood of a Hyunda Genesis sedan. The Gen Coupe's rear seat has been tossed to make room, and the V8 has been upgraded with eight individual throttle bodies, a set of JE pistons and an AEM engine management system that all work in concert to bump power to 500 horsepower. In order to make the engine accessible back there, RMR also replaced the trunk lid with a carbon fiber rear hatch that's vented and hinges near the roof line.Being a SEMA car, there's hardly a bolt or nut on this car that hasn't been modified. The stock transmission was swapped out for a Mendeola five-speed sequential gearbox and the stock suspension augmented by a set of KW coilovers. HRE 560 Series 20-inch wheels, Toyo T1R tires and a StopTech braking system round out the hardware upgrades. The exterior, meanwhile, features an RMR Signature Edition kit with carbon fiber spoilers and custom RM ONYX HD paint job by BASF. The interior sports seats plus alcantara and carbon fiber trim panels from Sparco, and there's a boomin' sound system by Infinity as well. We're interested less in the RM460's flashy bits than what the car means. It's a rolling test bed for how far both the Genesis Coupe and the 4.6-liter Tau V8 can be pushed, and hopefully RMR will pass all that knowledge onto Hyundai for incorporation into future iterations of the Genesis Coupe.