Cat 3406E 7in Pipes - this mod adds to the game new sounds of the CAT 3406E Straight Pipe engine when using the engines below. Any other engines will use the standard SCS sounds. Trucks compatible: - scs w900 - scs Peterbilt p389 - scs Volvo vnl - Freightliner XL by john ruda’s - Kenworth w900 by john ruda’s - Freightliner FLB - Pingas Peterbilt - Perterbilt Viper - Kenworth k100e Tested on game version 1.41.x