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 in combination with the Western Star aerodynamic roof and side fairing options.

In addition to the new vertical exhaust, Western Star also has a cab-mounted vertical exhaust and a horizontal tail pipe option.

“We know our customers seek customization options and configurations that personalize their trucks without compromising performance,” said Guy Lemieux, marketing segment manager for Western Star. “The Western Star 4700 has a wide selection of premium, aerodynamic and lightweight options that are as tough as our trucks.”