The next time you see a semi truck rumbling down the highway, pay attention to the vertical exhaust stacks rising up from behind the cab. These exhaust pipes aren't just for aesthetic purposes: These ...

The Western Star 4700 set-back and set-forward truck and tractor models can now be spec’d with a frame rail mounted vertical exhaust stack, the company announced. This configuration is now available ...

Western Star Truck Sales, Inc. today announced that a frame rail mounted vertical exhaust stack is now offered as an option for Western Star 4700 set-back and set-forward truck and tractor models.

you make a tough truck more fuel-efficient, it’s a win-win dream scenario. Western Star Trucks announced that a frame rail-mounted vertical exhaust stack now is available as an option for the ...

Western Star Truck Sales, Inc. says a frame rail mounted vertical exhaust stack is now offered as an option for Western Star 4700 set-back and set-forward truck and tractor models. This configuration ...

Western Star says a frame-rail-mounted vertical exhaust stack is now offered as an option for model 4700 set-back and set-forward truck and tractor models. This configuration is available in ...

One question I often am asked is, “How tall should the exhaust stack be?” It’s a seemingly simple question, but the only way to get an exact answer is to run an air dispersion model. That takes time, ...