G6DK - This version of the Hyundai 3.8 engine has an aluminum block, aluminum dual overhead cam (DOHC) cylinder heads, and dual continuously variable valve timing (D-CVVT) from the factory which allows it to achieve a horsepower rating between 299 and 312 hp. It was used as a 2008-2011 Hyundai Genesis engine and a 2009-2015 Hyundai Genesis Coupe engine.
G6DJ - This variant of the 3.8-liter Hyundai V6 engine featured 11.5:1 compression and ranged in horsepower from 311-348 hp. This performance V6 Hyundai engine was used in the 2016-2020 Genesis G80, 2015-2020 Genesis G90, 2011-2015 Hyundai Equus, 2011-2016 Hyundai Genesis, and the 2011-2016 Hyundai Genesis Coupe.
G6DN - Introduced in 2018, this engine has an Atkinson cycle along with a compression ratio of 13.0:1 and a horsepower rating of 291 hp. This engine was used in the 2018-present Hyundai Palisade and the 2019-present Kia Telluride.