i cant find any longtube headers for the 6.0 will 4.8 and 5.3 lt headers work?
i was looking at the 99-04 Sierra/Silverado Ceramic Coated Pacesetter Longtube Headers

 

Yes Sir, the pacesetters LT's are all the same for the 99+ 4.8/5.3/6.0's. They are very popular and there's quite a few members who have them.

Check out the sponsors to right like, Texas-Speed, and Speed Engineering they sell'em!

 

I beleive the Dynatechs fit all as well, I had those and they rocked.

 

the pacesetters are a pretty good header for the dollar IMO. dynatechs are just as good. i got mine from byunspeed for cheap cheap