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It doesn’t add a lot dyno wise, but it’s enough to melt a max loaded truck down with an operator who doesn’t know how to drive it, the aftercooler is a JOKE by not only being restrictive but barely removing heat from the air charge and often adding heat in cooler weather to the charge. If you...

So there’s 2 screws top and bottom of that cap that i removed, then under it was simply 2 jam nuts there, I used a large 3/8 drive socket on the big nut held socket with channel locks, then used a 1/4 socket with extension I had inside the 3/8 drive socket and loosened it, then backed the small...

Can you take a picture of said tamper screw? I didn’t have anything tamper proof on my unmolested 8.3 so I’m curious Sent from my iPhone using Tapatalk

Under the Allen head is strictly “Low-Boost fueling” meaning it adds fuel before boost comes on, but doesn’t alter the end power of the engine. You have a Bosch MW pump most likely, and the main fuel is located on the rear of the pump with a jam nut. You’ll want to give it a little low boost...