6.2 hellcat crate motor

The new challenger with the 6.4 is putting out 485 hp /430 at the wheels ,while getting 25 mpg on the highway, and with a supercharger kit from Kenne Bell power is close to the Hellcat engines .

http://www.hotrod.com/features/1503-2015-dodge-challenger-scat-pack-dyno-test/