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Factory air box vs intake FLOW

6K views 38 replies 19 participants last post by  2500 hd 
#1 ·
Ok guys just looking at this factory air box on my 2013 Sierra 2500HD 6.0 vortex... I have a drop in filter right now.. How well do these motors benefit from a cold air intake?? This factory box looks like it doesn't flow that great with all these extra compartments....
 

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#23 ·
I upgraded to a 2016 2500HD and kept the airraid tube from my 2009 1500. looks like it will fit. Will try it son and report back.
 
#25 ·
Love it. way nicer ride that my '09 and yes i got the SLT so its loaded. Only have 500 miles on her so its not even broken in. Wont know how it feels towing till spring as the trailer is put away for the season but i am sure it will be a much better experience with the 2500. Trailer on weighs 6600lb but now I can put the wheeler in the bed and tow and still be legal.
 
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