This mod is Cummins ISX Signature with straight piped sound for SCS and modded trucks Version 1.0 Feature: -Cummins ISX Signature 520-620HP with straight piped sound -Custom sound attenuation for realistic sound fade off with distortion effects -Custom exhaust distortion for realistic exhaust tone and works along with custom attenuation -Custom sound orientation for realistic sounds from different angles -Included idle jake brake system -Included Improved Customizable Additional Supported Trucks (CAST) in the mod