LS6 manifold? casting #?

I found a couple LS6/1 intakes on ebay by some dude who either doesnt know his stuff at all (claims his friend races vetes and came off a vette) or he knows its an LS1 and is advertising it as an ls6.

He has no pictures of the bottom at eye level, so i can't check that.
Both the intakes have no EGR provisions, so that leads me to believe its ls6?
One of the pictures has a casting number, but its blurry i think it says: 2556333 and the other he says is 12560894?

any help would be great

If there is no egr then they are LS6.

be aware that LS1 based vettes never had EGR so it could still be an LS1 intake and not an LS6 intake.
not sure of the LS6 part number off the top of my head.

hey man is there anyway you could find it? I have searched and found nothing! And some guy keeps bidding against me, and i'm not gonna give up untill i hit $250

whats the auction number?

if I dont get this I'm debating to save for a Fast 90/90 setup... P&P heads, 2.02/1.60 and F13... i think the fast combo could boost about 20ish hp. while the ls6 dyno proves only 12.. still would like one for 250..

heres one: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=8076314070&ssPageName=MERC_BC_ReBay_Pr2_PcY_BID_W0_IT

here's two: item #: 8076316560

thanks

12573572 Should be the part number for an LS6 manifold

88890523 Intake manifold for 01 F-body

SDPC PN is slightly similar.....88958675 LS1 / LS6 Intake Manifold, 4-Barrel Carburetor / EFI (??)
SDPC PN For the other LS6 IM.......88894339 LS1 / LS6 2001 Z06 Intake Manifold


http://www.sdpc2000.com/catalog/1980/GM-Performance-Parts-LS6-and-LS2-Intake-Manifolds.htm



I added a !buttload! of new PN's to my stickey....

you sure on that part number

so thats an ls6! thanks man, i didnt know you added to the sticky.

edit. Wait, I'm confused. Are you saying either of those auctions are LS6's?

I just added them as I responded to the thread.

I got some #'s from a website and I was also on the SDPC website....

I just added them as I responded to the thread.

I got some #'s from a website and I was also on the SDPC website....

Ok, sooo.. sorry maybe i'm not getting it, (i'm pretty thinck sometimes) but those two in the auctions... are they regular ls1 or ls6 stye? so far i'm winning..

That confused me also.. They listed both intakes and one of them they had listed as a 4BBL carb and EFI .....that's why I added the ???'s

Ok let's try some other places... ...

I got this off the LS1speed.website.. GM88890524 (also listed as GMPP)

I got this off of GM parts Direct ...... 88894339

They didn't list the RPO of the engine or the displacement...only V8

http://www.motorplace.com/friesen-pcx/parts_catalog.cgi

No EGR's gotta be an LS6... Did the 5.3's have the EGR in the same location? Or is it a different manifold all together? I haven't seen a 5.3 in a while..

PN's change all the time - 12556333 is a LS1 intake for the 97-00 vette.

PN 12560894 also appears to be a LS1 intake.

Those are BOTH LS1 manifolds.
Not only is the bottom not flat, but they have the X shaped bracing between the ports. An LS6 manifold has a flatter bottom and 1 verticle w 2 horizontal ribs in the area between the ports.
Here is a pic. The LS1 is on the left.
http://www.ls1howto.com/howto/geniii/intakemanifold//IMAGE009.jpg

Note the difference in the area between the ports and the LS1 having the bump in the middle.

Ahhhh Thanks alot guys. Its good to have this all cleared up, Bayer, you might want to add a section to the sticky about LS1 vs LS6 intakes lol. I've seen this issue many times and its difficult. If we can all get it sorted out you should add it in.

Good sh!t... Did and done! Thank for the info... Learn something new everyday! I added a BUTTLOAD of new stuff to the stickey... to include a section on FREE MODS....

I have to say, this has been quite educational!.... I love this place! :cz28:

All hats off to Bayer and Greed