re: What are your thoughts on "Rolling Coal"

In all honesty it varies depending on how old the truck is. The older trucks were detuned by the factory so turning them up actually helped them. The newer trucks are not detuned, they are choked down with emissions bullshite. It hurts them to turn em up.



The only way to improve the mileage on newer ones is to open up the exhaust and match the fuel system to how much air you can get into and out of the motor