Feature CAT 3406E 475-625HP and 800HP Tuned engines with straight pipe sound Custom sound attenuation for realistic sound fades off and distortion effect Custom sound orientation for realistic sound from different angles Custom exhaust distortion for realistic exhaust tone depends on distance and throttle pressed Special variable exhaust tones Included Customizable Additional Supported Trucks (CAST) in the mod This mod is CAT 3406E with straight pipe sound for SCS and modded trucks Credits UMT