CAT 3406E Straight Pipe – with a straight pipe will produce a loud and aggressive sound compared to one with a muffler installed. It is also known to have a deep rumble or growling sound that is common among diesel engines. The overall sound of the engine will depend on factors such as the diameter of the pipe, engine speed, and load.
How to use idle jake brake:
1. hold light horn button (J button) for 1 second, then release
2. tap light horn button once again, and idle jake brake should be engaged
3. Repeat the same process to turn off
Credits:
Slav Jerry – sound modding and samples
SCS Software – sound samples