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#4
08-16-2010, 02:24 PM
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Not a duramax but I did it on my Cummings back in 06. 5" Magna flow exhaust from the turbo back (no cat) & AFE cold air induction & programmer, get 24.5 to 25 on good interstate & 19 pulling a 24' Skeeter. Without programmer still get around 20 to 20.5. Check out the diesel forums, tons of guys on there that's on top of their game with all that.
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