Upgrading Engines sound pack 2.4: On -Reworked ISX Cummins (many new sound files (thanks to Nicolas Robert for his sample), I have also reviewed resins. -New Sound engine Cummins N14 Celect Plus. -Dryer Air and sound for ISX CELECT Plus (Beta). -Peterbilt 579, 389 Peterbilt and Kenworth T680 is now supported with certains engines in ... Read more