Say hello to the HPE800 Charger Hellcat. It cranks out 805 horsepower, and it does so thanks to a handful of tweaks. These include a new ECU with upgraded tuning software, a less-restrictive air filter, an upgraded lower pulley that increases boost by 1-2 psi, and a port-matched throttle body. That's not a ton of work, and it's not surprising considering that there were rumors of more power on tap from the Hellcat cars before Dodge backed off to the far more reasonable 707 figure.