# Head Gasket
**URL:** https://forums.speedlife.net/t/head-gasket/169631
**Category:** PittSpeed Automotive
**Created:** [October 6, 2004, 7:17pm UTC](https://forums.speedlife.net/t/head-gasket/169631 "2004-10-06T19:17:43Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)
#### Post date: [October 6, 2004, 7:17pm UTC](https://forums.speedlife.net/t/head-gasket/169631/1 "2004-10-06T19:17:43Z")
Long shot, but does anyone have either a Fel-Pro 1047 or an Impala LT1 head gasket I could compare to my stock one?
I need a thinner gasket, but I want to see them first. I’ve heard the Impy one was made for iron heads and may also have smaller coolant holes.
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### Author:  [@BlkP42E](https://forums.speedlife.net/u/BlkP42E)
#### Post date: [October 6, 2004, 7:34pm UTC](https://forums.speedlife.net/t/head-gasket/169631/2 "2004-10-06T19:34:26Z")
why would you need thinner head gaskets??? you are using stock heads again right?
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### Author:  [@Pewter](https://forums.speedlife.net/u/Pewter)
#### Post date: [October 7, 2004, 4:57am UTC](https://forums.speedlife.net/t/head-gasket/169631/3 "2004-10-07T04:57:49Z")
new or used?i can get new ones,than send them back!
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### Author:  [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)
#### Post date: [October 7, 2004, 8:55am UTC](https://forums.speedlife.net/t/head-gasket/169631/4 "2004-10-07T08:55:18Z")
> [@BlkP42E](#):
>
> why would you need thinner head gaskets??? you are using stock heads again right?
Heads are ported & milled about 0.010", just to clean them up.
The smaller thickness is recommended not for the increased compression ratio, but to improve the quench (compressed head gasket thickness plus deck height should be around 0.035"). The Impala gasket is 0.029 vs stock of 0.047, which brings it closer to an 0.035" quench, and reduces chances of detonation. Seems contradictory - higher compression but less detonation, but I believe it’s the higher velocity that increases the cooling.
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### Author:  [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)
#### Post date: [October 7, 2004, 8:56am UTC](https://forums.speedlife.net/t/head-gasket/169631/5 "2004-10-07T08:56:51Z")
> [@8.1crew](#):
>
> new or used?i can get new ones,than send them back!
Doesn’t matter if new or used, just want to compare them. I’m trying to find them in stock somewhere to look at them, but if not I might take you up on that offer.
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### Author:  [@Pewter](https://forums.speedlife.net/u/Pewter)
#### Post date: [October 7, 2004, 9:31am UTC](https://forums.speedlife.net/t/head-gasket/169631/6 "2004-10-07T09:31:14Z")
anytime,just let me know !