Forced Induction - Truck Manifolds?

Alright I am looking to make a custom truck manifold kit. I have looking around for some manifolds and I came across some today. The guy says that they are from a 6.0L truck but they don't look like what I have seen before. Here is a picture of them, if anyone knows what they are please let me know.

http://i20.ebayimg.com/04/i/001/19/8d/e27f_1.JPG

My 2005 6.0l manifold looked like the ones in this auction. I saw the ones you posted the other day on eBay and was wondering what truck they came off of. Every 4.8, 5.3 and 6.0l stock exhaust manifolds I've run across look like the ones in this link.

http://cgi.ebay.com/ebaymotors/4-8-5-3-6-0-LS1-LS6-LQ4-LQ9-Exhaust-Manifolds_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2e l1116QQitemZ260291002124QQptZMotorsQ5fCarQ5fTruckQ 5fPartsQ5fAccessories

Rick

http://cgi.ebay.com/ebaymotors/4-8-5-3-6-0-LS1-LS6-LQ4-LQ9-Exhaust-Manifolds_W0QQcmdZViewItemQQ_trksidZp3286Q2em20Q2e l1116QQitemZ260291002124QQptZMotorsQ5fCarQ5fTruckQ 5fPartsQ5fAccessories

Those are the ones I normally see too, but this guy said that these manifolds were off of his 2003 6.0L Silverado.

The ones on my 6.0L 2001 GMC do not look like that. I have never even seen any look like that. At work we have a 2005 Chevy with the 6.0 and it does not have EGR but they still do not look like that!

Those are ls2(6.0) GTO manifolds. They flow incredibly well for what they are. Use them if you can but, no room for a flip mount in an f-body.

Those are ls2(6.0) GTO manifolds. They flow incredibly well for what they are. Use them if you can but, no room for a flip mount in an f-body.

Thanks for the info, I guess I'll keep looking.