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Class 7 and 8 tractor-trailer are aero-dogmeat because of the chief virtue of the tractor-trailer setup: flexibility. Class 5 and 6 straight trucks may offer some scope for aero-improvements although most of these are local delivery trucks. However there are the hotshotters.
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2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
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