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Soot = graphite.
According to the EPA's report to Congress in 2005, nobody living today can remember cleaner air throughout the US.
One would think you could trade on that clean air to allow more efficient engines. But EPA extremists just don't see it that way.
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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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