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  1. 3.0L Duramax
    Looking into an exhaust system for a 3.OL Duramax AT4 - Can anyone point me in the right direction? Looking to add a little more noise. Not necessarily doing it for for extra Torque or Horsepower.
  2. 6.5L Diesel Engine
    When I bought my truck it already had the vacuum waste gate removed and replaced with a manual one. Not sure of the make. So I added the obvious gauges most diesels have and it was set to 8-9psi. I upgraded my exhaust to a 4" and now I'm seeing 14-15psi. Gonna turn it down because I don't know...
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