Cummins ism 

I see all these guys saying shifting with the engine brakes destroys the engine,but guys been shifting millions of trucks with the jakes switch on and nothing ever happens to the motor at all.

Good job at floating over gears man a lot of people can't do it anymore

It sounds like a celect plus model

Que barbaridad ese tipo con el freno de motor activado a toda hora

She's breathing 🔥🔥🔥😮‍💨😮‍💨

Cool video, not trying to tell u how to shift but it would sound better if you turn the hakes off while u shift

Keep on shifting with those jakes ON

Man good Job jammin dem just like a propah Jamaican over the water

Man turn the Jake's off between shifts. So unnecessary lol. Otherwise she sings

Que buen camión pero lástima de operador

👍😂😂

probre freno de motor

NEMF runs ISM's in their trucks and my old fire department just got a 2000 kme with a ISM 400

Good way to fuck up your motor. Sounds cool tho

Sería mejor en espańol