I lowered my F-350 4" in the front and 6" in the rear and noted a 1.0 MPG improvement.
Truck was in alignment before and after.
Truck drives fine.
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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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