This mod contains the X15 series engines produced since 2016, replacing the ISX series to meet EPA specifications. It contains the following engines, in the Stock and Delete Straight Pipes variants: Efficiency -485 HP -500 HP Efficiency ADEPT -485 HP -500 HP Performance -550 HP -600 HP Performance ADEPT -550 HP -600 HP Delete Straight Pipes -485 HP -500 HP -550 HP -600 HP Please, if you want to share the mod, please respect credits to the respective authors and use the link provided by the creator of the mod. It has support for the following trucks: Freightliner -Cascadia International -HX520H (Harven) -Lonestar -LT Kenworth -T680 -T880 (FrankPeru) -W900 -W990 (Harven/FrankPeru) Peterbilt -389 -579 Volvo -VNL Western Star -49X -57X -5700XE This mod is the last one I will do, as I will focus on projects related to content creation and editing. First of all, many thanks to those who downloaded this and other mods and their respective updates. In the future I will update some necessary mod. Credits: eelDavidGT, Kapitan Kriechbaum, GTM Team (specifications engines)