Here is some pics....of the Stacks.

Originally Posted by
cummins
not off the start...when its under load mainly...after the turbo spools up the motor is right behind it. when the injection pump catches up its a shi!t load of fuel being dumped in into the cylinders. coal is just un burnt fuel pissing out your tail pipe..(BLACK SMOKE) in the hills my truck blows a little black smoke when towing.
remember back in the day when farmers used to put stacks on their trucks so they wouldn't start grass fires when working in the fields. now its the coolest thing ever lol
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