Quote:
Originally Posted by DURAMAX TIM
if u put them in backwards it uses twice as much fuel or one right and one wrong they cancel each other out.
They claim it even helps the dmax trucks, what the TURBO doesn't spin the air enough 
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In their defense, there is a big difference between the air circulating through a turbocharger and the actual twisting vortex that their product aims to achieve.* One is like driving around in a circle, the other is like rolling your vehicle.