This mod is interior soundproofing effects for all SCS trucks and lots of truck mods Version 1.0.1 Changelog: Improved Peterbilt 389 effects Version 1.0 Feature: Interior soundproofing effects which each trucks have different soundproof effects can be seperated into 13 groups of soundproof effects: Old Peterbilt New Peterbilt Old Kenworth New Kenworth Old Mack New Mack Old Freightliner/Western Star New Freightliner/Western Star Cabover Peterbilt Cabover Kenworth Cabover Freightliner International Unique trucks Yeah that’s all, what do you expect Credits SlavJerry