Cummins ISX/X15 Straight pipe sound 4.0

Cummins ISX/X15 Straight pipe sound - [4/23/2022|1.43-1.44] Version 3.0 Changelog: -Rebuilt the ENTIRE mod -Separated engines and sounds into 4 variants: ISX CM870 400, 450, 500, 525, 550, 565, 600 ISx EGR 400, 450, 500, 525, 550, 565, 600 ISX CM2250 450, 500, 550, 600 X15 400, 450, 500, 525, 565, 60...