Perterbilt 579....All i gotta say is WOW

Is that why traditional hoods average $10,000 more resale value. You always stock more of your best seller. By the way those barndoors have more aerodynamics engineered into them than you think. This is an old arguement fuel economy is only partly dependent on areodynamics the biggest factor in fuel mileage is whose right foot is on the throttle pedal. I get a steady 7.1 mpg with a Western Star 4900ex which certainly is not considered aerodynamic.

 

Long as there's demand for 389 and W900, they will never be discontinue, long as I keep on trucking I will always have W900 or 389