# Header flanges

**URL:** <https://forums.speedlife.net/t/header-flanges/170710>\
**Category:** PittSpeed Automotive\
**Created:** [November 30, 2004, 4:36am UTC](https://forums.speedlife.net/t/header-flanges/170710 "2004-11-30T04:36:44Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Jeff95TA](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jeff95ta/32/5935_2.png) [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)\
**Post date:** [November 30, 2004, 4:36am UTC](https://forums.speedlife.net/t/header-flanges/170710/1 "2004-11-30T04:36:44Z")

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I put a straight edge across my header flanges and they aren’t exactly flat. Probably 1/8" to 3/16" difference. Called MAC and they said they will pull flat to the heads. I see a major exhaust leak in my future. What do you think?

I don’t want to grind them flat because they’re already ceramic coated.

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**Author:** ![Pewter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pewter/32/5936_2.png) [@Pewter](https://forums.speedlife.net/u/Pewter)\
**Post date:** [November 30, 2004, 4:56am UTC](https://forums.speedlife.net/t/header-flanges/170710/2 "2004-11-30T04:56:15Z")

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get good fel-pro gaskets(1406 or1409)soke in water for a day,install,tighting from middle out! middle,then next to the front ,than next to the rear & so on!

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**Author:** ![Jeff95TA](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jeff95ta/32/5935_2.png) [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)\
**Post date:** [November 30, 2004, 5:00am UTC](https://forums.speedlife.net/t/header-flanges/170710/3 "2004-11-30T05:00:45Z")

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> [@8.1crew](#):
>
> get good fel-pro gaskets(1406 or1409)soke in water for a day,install,tighting from middle out! middle,then next to the front ,than next to the rear & so on!

Got some 1406s. I’ve heard about the soaking thing - I guess the swelling makes them seal better.

Hopefully the pipes will bend enough to go flat against the heads. They’re all separate tubes (they’re not connected with a bar) so they should bend easier. We’ll see!

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**Author:** ![Pewter](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/pewter/32/5936_2.png) [@Pewter](https://forums.speedlife.net/u/Pewter)\
**Post date:** [November 30, 2004, 5:42am UTC](https://forums.speedlife.net/t/header-flanges/170710/4 "2004-11-30T05:42:53Z")

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yup,they should!

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**Author:** ![Darkstar](https://avatars.discourse-cdn.com/v4/letter/d/b487fb/32.png) [@Darkstar](https://forums.speedlife.net/u/Darkstar)\
**Post date:** [November 30, 2004, 5:44am UTC](https://forums.speedlife.net/t/header-flanges/170710/5 "2004-11-30T05:44:56Z")

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> [@Jeff95TA](#):
>
> I put a straight edge across my header flanges and they aren’t exactly flat. Probably 1/8" to 3/16" difference. Called MAC and they said they will pull flat to the heads. I see a major exhaust leak in my future. What do you think?
> 
> I don’t want to grind them flat because they’re already ceramic coated.

you said header… :kekegay: