For 2015, Chrysler introduced an all-new high performance supercharged variant of the Hemi engine, called the Hellcat (named after the Grumman F6F Hellcat). It features the same bore as the 6.4 L Hemi and the same stroke as the 5.7 L, giving it a total displacement of . The supercharger is a twin-screw IHI unit with integrated charge coolers, capable of producing of boost. This engine is rated at at 6,000 rpm and at 4,000 rpm of torque and has a compression ratio of 9.5:1. This engine was the most powerful engine produced by Chrysler as well as the most powerful production engine ever in a muscle car until the Dodge Demon was introduced. This engine is not equipped with Chrysler's Multi-Displacement System. In 2017, Mopar announced that it would sell it as a crate engine under the name Hellcrate.You Can Buy a 707-HP Hellcat Crate Engine Directly From Mopar - Brian Silvestro, Road and Track, October 30, 2017 A Redeye version with debuted in the Dodge Challenger in 2019, followed by the Dodge Charger in 2021.
