Anyone know if they make headers for an 05 gmc z71 with a the 5.3L/327 looking for good perfmorance ones like headman can't find anythough any help would be appreciated

They do, but get the long headers. There isn't much of a gain going to shorties on those Vortec engines.

Check out www.summitracing.com or www.truckperformance.com as well as other suppliers :cool:

Biggest bang for the buck I have seen is the custom PCM tune from www.wait4meperformance.com :burnout: