Ok, so I am editing the s550 mod by @Tsutarja495 so that the i4 and v6 have their engine sounds and startups restored from the previous version. When I first started, I didn't yet change the sfxBlend2D file, so they worked as long as the new s550.zip was accompanied by the old 1517mustang.zip file. However, it works independently now. My remaining problem is that the startup sounds only work if the lines shown below are in the mainengine sections of the engine jbeam and s550.zip is accompanied by 1517mustang.zip. "starterSample" : "s42_starter", "starterVolume" : 1.0, I tried to make it work with the current version of BeamNG independently of the old file with this: //starter motor "starterSample":"s550:>art>sound>starter>s42", "starterSampleExhaust":"s550:>art>sound>starter>s42.ogg", "shutOffSampleEngine":"event:>Engine>Shutoff>i4_2001_eng", "shutOffSampleExhaust":"event:>Engine>Shutoff>i4_2001_exh", "starterVolume":7.00, "starterVolumeExhaust":6.0, "shutOffVolumeEngine":2.0, "shutOffVolumeExhaust":1.36, "starterThrottleKillTime":0.6, "idleRPMStartRate":2, "idleRPMStartCoef":1, I think my problem is with the startersample file location. For reference, the sound files are in s550.zip/art/sound/starter. I have no idea how to set the file path for this in the jbeam. I have tried many different approaches to this but the startup sounds refuse to work, although the shutoff sounds located somewhere in the vanilla game work fine. Any help is appreciated.