Join Date: May 2017
Location: Spring Lake, NC
Thanked 28 Times in 27 Posts
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They may have added an injector pulse, i am not 100% sure. Generally pulse timing, width and duration make more noticable changes under load. In the end its probably a combination of all the factors. I think at idle though, the biggest change to the noise level is the hydraulic lifters.
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2016 2500 Laramie Longhorn 4wd CTD crewcab Granite Crystal Metalic, 2" Pure Performance triple rate leveling springs, Adjustable front Trackbar, Stealth Module