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LS7 Head Gasket Thickness?

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Old Jul 22, 2006 | 11:08 PM
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Default LS7 Head Gasket Thickness?
Anyone know the compressed thickness of the GM LS7 head gaskets? I plan on using LS7 heads and rockers on my motor, so I figure if I have the same thickness gaskets then I can use the LS7 pushrods as well and not worry about getting custom length pushrods. Also, will LS1 head gaskets work with LS7 heads on an LS1 block? I imagine they would, just want to make sure. Thanks!
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Old Jul 23, 2006 | 09:32 AM
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I have a set of OEM LS7 head gaskets on the shelf and they appear to look just like the OEM LS6 ones that I have.
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Old Jul 23, 2006 | 10:57 AM
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Can you measure the thickness of them? Do they have the same bore as the LS6 gaskets too? Thanks John!
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Old Jul 23, 2006 | 04:54 PM
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The LS7 gaskets appear to be the same uncompressed thickness ~0.055" thick but the bore on the LS7 gasket is larger at 4.150".
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Old Jul 23, 2006 | 09:25 PM
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Originally Posted by John B
The LS7 gaskets appear to be the same uncompressed thickness ~0.055" thick but the bore on the LS7 gasket is larger at 4.150".
That thickness would be perfect to get my 11:1 SCR, and the bore will work great too. You wouldn't happen to have the part number for the LS7 head gaskets would you? Thanks again!
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Old Jul 25, 2006 | 07:07 AM
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You wouldn't happen to have the part number for the LS7 head gaskets would you?
Unfortunately I can't find my receipt and the P/N isn't stamped on the head gasket...all it says is 7.0L, sorry. Call Brian at SDPC, he'll have it and can get them for you.
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Old Jul 26, 2006 | 11:41 PM
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Anyone else possibly have the part number?
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Old Jul 27, 2006 | 08:30 PM
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Found it! 12582179, about $50 from dealer each, and $30.18 from SDPC. They are priced very well and the specs on them are perfect. They are also MLS I believe.
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Old Jul 27, 2006 | 08:32 PM
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They are on intergalactic backorder and that is why we stock Cometics. .051
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Old Jul 27, 2006 | 09:55 PM
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Originally Posted by Katech
They are on intergalactic backorder and that is why we stock Cometics. .051
Is LS7 everything on backorder?
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Old Jul 28, 2006 | 05:22 AM
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Originally Posted by Katech
They are on intergalactic backorder and that is why we stock Cometics. .051
Yes,they are unless you have a vin # and a friend at the parts counter.Just got some that way
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Old Jul 28, 2006 | 07:43 AM
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Originally Posted by Ferocity02
Is LS7 everything on backorder?

No, we've been getting some parts. A lot of stuff is on backorder though.
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Old Jul 28, 2006 | 02:17 PM
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be careful with pushrod length if you use an aftermarket cam. it will probably have a different base circle.
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