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
