Headers on 3.4L worth the $$$???

I did a search but didnt come up with much... what kind of power can be expected from the headers on the 3.4 V6. Was thinking of doing them on my truck if its worth it, Figured a little extra flow would help with the supercharger. But havent been able to find much info. Does anyone have before & after Dyno #'s, Pros, cons ect... TIA

 

Not on a n /a motor

 

Edit -didn't read that you had a supercharger. Yes they are nice with the supercharger!

 

Good to know, thanks! Any other input is welcome please!

 

It can be different gains form different headers.
Long tube headers will give more high end gains
Short tube header will give more of a low to mid level gains.

 

Bec California is lame, I'm thinkin the 50 state legal headers if that helps...