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The stack is gone, and was replaced with a 4'' AFE sys with free-flow muffler. This made a huge difference in drone sound in cab. The only thing that I noticed was a slight increase in pre-turbo backpressure, at any rpm above 2K there is a constant 5psi showing where before it rested on 0 (this is with the truck rolling in gear and no throttle input). The EGT's saw no change, the spooling may have been slowed very slightly.
Next will be the valve covers. I am going to try the bed liner (extra heavy coating) to see if this takes the injector rattle down a few notches.
The turbo is pretty quiet for now, we will see after the other mods.
Next will be the valve covers. I am going to try the bed liner (extra heavy coating) to see if this takes the injector rattle down a few notches.
The turbo is pretty quiet for now, we will see after the other mods.