Peterbilt tractor design changes

Peterbilt Motors Co. is making some exterior and interior changes to its line of trucks and tractors
Feb. 23, 2009

From Fleet Owner Senior Editor Sean Kilcarr: Peterbilt Motors Co. is making some exterior and interior changes to its line of trucks and tractors. Ken Marko explains how various aerodynamic improvements to the Model 384 tractor reduces drag by 24 percent.

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