Heard that too..

 

maybe stock for stock or deep down low, but defenatly not up on the top side.

 

True!

 

im pretty sure our truck intakes only flow real good like said above, stock and low rpm but when rpms get going and mods get added it doesnt really cut it and if you are wanting to build a n/a monster you need to upgrade EVERYTHING

 

I see.. Well Im gettin a cam and spinning it up to about 6800... So would I be better off gettin an LS1/6 manifold?

 

I would imagine seeing how our stock intakes arent supposed to flow well past 5800 or so ive heard.

 

N/A 5.3's make peak hp around 5900, just to give you an idea.
don't know much about the 4.8's though.

 

That's good to know!

 

Werd... Then time to get an LS6 intake...

 

a fast intake manifold with a 90mm throttle body would be nice...