I recently installed some very nice stainless steel headers for my 2009 GMC 1500 Sierra 5.3 Crew Cab 4x4 truck. They are made by XS Power They are the non-catted 1.75" primaries and 2.5" y-pipe. They fit flawlessly and I couldn't be happier because they didn't cost me $1500. I also but the exact same header on my 2500HD pickup.Here are some pics:

 

i really like these can u give me a link to where u purchased them please

 

Yea, love the look of those headers, just wish they had bigger collecters, wonder if they would fit an 02 model good? I hate my ebay headers for plug changing reasons

 

Those look like the Dynatech/OBX copies that are available for a 00-06 Tahoe/Yukon on ebay...were they also available with resonators in place of the cats?

 

Yeah but without that silly hump

I looked on there site and didnt seeany longtubes for trucks..

 

My LPP's had an XS Power label on them, so I would imagine they are the 07+ version, unless they wanted to redesign their 99-06 headers. Mine are 1.75" and 3" and slip fit.

 

The forum wont' allow me to post a non-sponsored link but just google xspower.

 

They did not offer any resonators when I called them. These are a catless version.

 

I believe you are correct about LPP being a reseller of the XS Power label.

 

These headers are brand new to XS Power. I only found out about them when I was planning on ordering a set of headers for my 2010 Camaro. I asked them if they offered anything for my truck and Joe @ XS Power said he could send out some of the first ones they had in. If you guys are interested in these, just send an email to him. Mine shipped out the day I ordered them. I couldn't be happier with their customer service and the quaility of their product. I am sure they will be adding these to their website shortly.