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Discussion Starter · #1 ·
new to the site just bought a 2013 Denali HD with a duramax what kind of upgrade are best for this vehicle, performance and milage
 

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Welcome to the forum!!!
 

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This place sucks dicks
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Cool pics bro! Great intro! Welcome!
 

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Welcome, nice to see someone thats at least in the same state. As said the intake and down pipe are the best legal ways to go about it. I get 16.5 in town on 35s and 24 on the hwy but i have efi live as well
 
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