ZO6 Header gasket part #
Thread Starter
Racer
Joined: Jun 2008
Posts: 350
Likes: 1
From: Fla
ZO6 Header gasket part #
Just picked up some 07 ZO6 headers and cats for my 2008 LS3 M6. Can someone tell me the part number for the ZO6 header gaskets I'll need to bolt this up to my LS3? Thanks, Dewman 
Last edited by Velocity2008; May 9, 2009 at 10:32 PM.
Racer
Joined: Jun 2005
Posts: 430
Likes: 0
From: Playa Vista CA
part #12594171 - gasket (d-shaped ports) to go between the engine block and the exhaust manifolds. You need to order 2 of those (they come in singles). I have a couple sitting next to me that I ordered weeks ago.
Thread Starter
Racer
Joined: Jun 2008
Posts: 350
Likes: 1
From: Fla
A pic of what I picked up yesterday. OEM 07 ZO6 Headers and cats. Can't wait till the h-pipe and NPP muffs get here. Ordering the gaskets and NPP in a box tomorrow.
Last edited by Velocity2008; May 10, 2009 at 11:12 AM.
Race Director
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
I used PN 12617944 and they seemed to seal well without any flow interference. I'd suggest a search and maybe discuss the differences before ordering.
Gene probably has every gasket available, but may not know the best one for your application. Although, he very likely has done several of these, apparently not everyone does it the same.
I kinda remember Powerlabs had some photos too.
Gene probably has every gasket available, but may not know the best one for your application. Although, he very likely has done several of these, apparently not everyone does it the same.
I kinda remember Powerlabs had some photos too.
Thread Starter
Racer
Joined: Jun 2008
Posts: 350
Likes: 1
From: Fla
ok, we have PN 12617944 Gasket Back - 6.0 liter - 6.0 liter and
PN 12594171 (d-shaped ports) Gasket Back - 7.0 liter - 7.0 liter
Thanks Gene for checking, please let me know which number to order.
Thanks, Dewman
PN 12594171 (d-shaped ports) Gasket Back - 7.0 liter - 7.0 liter
Thanks Gene for checking, please let me know which number to order.
Thanks, Dewman
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Racer
Joined: Jun 2005
Posts: 430
Likes: 0
From: Playa Vista CA
12594171 - z06, 7l header gasket. If you want the part that fits the z06 exhaust manifold (between the block and the ex. mani) get two of those.
I have mine from GeneC and staring at them right now - ordered online, waited a few days for him to get them in stock and he forwarded them to me right away. I think all told about a week. Your shipping time will vary.
I have mine from GeneC and staring at them right now - ordered online, waited a few days for him to get them in stock and he forwarded them to me right away. I think all told about a week. Your shipping time will vary.
Racer
Joined: Jan 2009
Posts: 405
Likes: 1
From: SPRING CREEK NEVADA
12594171 - z06, 7l header gasket. If you want the part that fits the z06 exhaust manifold (between the block and the ex. mani) get two of those.
I have mine from GeneC and staring at them right now - ordered online, waited a few days for him to get them in stock and he forwarded them to me right away. I think all told about a week. Your shipping time will vary.
I have mine from GeneC and staring at them right now - ordered online, waited a few days for him to get them in stock and he forwarded them to me right away. I think all told about a week. Your shipping time will vary.
Race Director
Joined: Sep 2007
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
According to a previous post on the subject, the PN 12617944 gasket is specified for the LS3 truck engine. They also match the LS7 heads perfectly. I'm not a fan of reusing crushable gaskets, but some people do with acceptable results.
Just because these gaskets have different part numbers doesn't necessarily mean they are not identical. If they are from different suppliers, the part number cannot be the same.
Maybe Gene can compare this number with the LS3 Corvette gasket and the LS7 corvette gasket to see if there are any dimensional differences. I'm sure we'd all like to know.
Just because these gaskets have different part numbers doesn't necessarily mean they are not identical. If they are from different suppliers, the part number cannot be the same.
Maybe Gene can compare this number with the LS3 Corvette gasket and the LS7 corvette gasket to see if there are any dimensional differences. I'm sure we'd all like to know.
Race Director
Joined: Sep 2007
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
If you overlay the ovals on the Ds, which is more restrictive?
When I put the oval gaskets on a LS7 head, they seemed to match perfectly. Did I miss something?
I just want to know if I should be expecting leaks if they burn out.
Racer
Joined: Sep 2008
Posts: 448
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From: West Monroe La. (Fastest Bolt On M6)
i put the full z06 exhaust on my 05..and i used the stock ls2 gaskets..However i do have a slight exhaust leak on the driver side..i'm gonna swap to ls7 gaskets and cross my fingers that it stops the leak...
Race Director
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
http://forums.corvetteforum.com/c6-t...n-from-gm.html
So if the LS3 gasket matches the head ports properly and the sealing surface will be effective crushed by the LS7 manifold, then that gasket will seal well.
However, if the LS7 manifold ports are much larger than the LS3 head ports, then the LS7 gasket needs to be used to seal properly.
In either case, the gasket should not interfere with the exhaust flow.
When I visually checked the LS3 gasket to a LS7 head, my biggest concern was bolt hole placement, not port configuration, so I failed in that respect to confirm the sealing aspect.
If someone who is doing the manifold swap would take pics of the different gaskets laying on the LS7 manifold it would show which ones will work best.
Pro
Joined: Oct 2008
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From: New Harmony IN
St. Jude Donor '09