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I have heard recently that headers aren't worth the money nor the effort to put on the 5.3l anyone else have any input or experience saying otherwise?
That would be true if the manufacturer was putting tuned exhaust manifolds on the engines but they don't, and probably never will, since it's not cost effective.

Where did you hear that?
 

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another forum im on chevytalk.org I havent gotten any bad advice from them yet and on this occasion i was pretty currious they also said that a cold air intake wouldnt do any good either but that sounds like bad info to me:confused:
 

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another forum im on chevytalk.org I havent gotten any bad advice from them yet and on this occasion i was pretty currious they also said that a cold air intake wouldnt do any good either but that sounds like bad info to me:confused:
Doesn't sound like reliable advice to me. IMO

Anyone else heard that before?
 

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"another forum im on chevytalk.org I havent gotten any bad advice from them yet and on this occasion i was pretty currious they also said that a cold air intake wouldnt do any good either but that sounds like bad info to me"


both are good for hp and torque gains
i think K&n rates 15 or so hp with a cat back plus cold air intake
add a set of headers you are probably looking at 18 to 20 more.
what they are saying may be that the $$ and effort to get them in may not be as beneficial as they had hoped until
you start adding big bolt ons! as in S/C or turbo.
 

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I got a 03 silverado 5.3L with cold air intake, programmer, throttle body spacer, what little performance mods can i do?
exhaust, low temp thermostat, mass air sensor, lightened pulleys, etc. there are several fairly inexpensive upgrades that make all the difference in the world.
 
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