This mod is CAT 3406E with straight pipe sound for SCS and modded trucks Version 1.0 Feauture: CAT 3406E 475-625HP and 800HP Tuned engines with straight pipe sound Custom sound attenuation for realistic sound fade off and distortion effect Custom sound orientation for realistic sound from different angle 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 Credits Slav Jerry - sound modding and samples SCS Software - sound samples