A device used on engines that uses a belt off the crankshaft to turn a pulley which turns fins mounted inside a casing. These fins increse pressure on the manifold side of the supercharger allowing more air into the cylinder on the intake stroke thus creating more horsepower.
And dying in yo' bed many years from now, would ya be willing ta trade all da days from dis here day ta dat fo' one chance, just one chance, ta come back here as young men an' tell our enemies dat dey may take our lives but dey will never take our freedom ... YUB NUB!