This mod adds those engines and their sounds in the game: Detroit Diesel DD13 Detroit Diesel DD15 Detroit Diesel 8V92 Detroit Diesel 60 series Cummins 444 Cummins M11 Cummins X15 Cummins Signature 600 Cummins N14 Cummins ISX (SCS sound reworked) Cummins ISX STRAIGHT PIPED (SCS sounds and from videos) Caterpillar V8 3408 Caterpillar 3406E Caterpillar C15 Straight Piped Caterpillar C15 STOCK Paccar MX series Mack MP8 Volvo D13 Update 4.0 (2022/03/02): Added Caterpillar V8 3408 engine sound. Cummins 444 improved and working in multi.