LAS VEGAS — Peterbilt has added a day cab version of its aerodynamic, fuel efficient Model 579 Epiq day cab, officials announced during the ATA Management Conference & Exhibition.

It’s aimed at fuel-conscious day-cab fleet customers in regional, tanker and bulk haul applications.

“Fuel-efficient day cabs have been an underserved market up till now,” said Darrin Siver, Peterbilt general manager.

The Model 579 Epiq day cab offers up to 14% improved fuel economy compared to the predecessor Model 386 day cab, Siver said, and that number can be enhanced further by using a drivetrain featuring the Paccar MX engine and Eaton Fuller Advantage automated transmission.

Among the aerodynamic enhancements on the Model 579 Epiq day cab are:
Multi-piece aerodynamic hood available in both 117- and 123-inch lengths;

• A three-piece collapsible roof fairing;

• Chassis fairings with rubber skirts from the quarter fender to the back of the cab and aerodynamic rubber closeouts under the sides of the cab;

• A three-piece aerodynamic bumper;

• A bumper air dam and bumper-to-hood seals;

• Front wheel closeouts and fender liners; and

• Chassis fairing kickouts.

Customers can specify the full aero package through Peterbilt dealerships for simplified ordering or customize it for specific needs, such as an aero bumper-to-back-of-cab package or an aero bumper-to-front-tandem package. The aerodynamic components and packages are also available through Peterbilt dealerships for aftermarket installation.

Peterbilt’s Model 579 Epiq day cab is available with the fuel-efficient Paccar MX-13 or MX-11 engine in a wide range of horsepower and torque ratings.

The three-piece collapsible roof fairing is an industry-unique design that in a few minutes allows the roof fairing to be lowered, according to Peterbilt. This allows the truck to be transported without the need to completely remove the roof fairing, as is common with most day cabs.

Other features of Peterbilt’s Model 579 Epiq package include low rolling resistance tires, the SmarTire Tire Pressure Monitoring System and a single horizontal exhaust configuration.