ETS 2 Daf E6 Reworked & Open pipe sound

Hello, This new truck is really amazing. I like it really. The first seconds of this video are with the stock reworked sound. Then, once swapped my engine, the open pipe sound is activated. So, what is this mod? I totally reworked the standard sound of this truck to make it sound deeper and realistic, then added my tires/bearings sound. The air lift axle has been improved too, now it finishes in a fade, progressively. Also, i have added two extra engines which are open pipe.