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Old 04-19-2008, 01:54 PM
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Default 311 exhaust

I found my exhaust manifolds leaking water. What suggestions does anyone have for replacement of stock exhaust for reasonable price. I have 420s with trs drives.
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Old 04-20-2008, 06:02 AM
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Originally Posted by highroller
I found my exhaust manifolds leaking water. What suggestions does anyone have for replacement of stock exhaust for reasonable price. I have 420s with trs drives.
The 420's have a pretty nice exhaust system. Where is it leaking? Maybe it just needs the faces cleaned and new gaskets.
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Old 04-20-2008, 10:08 AM
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They are leaking below elbows. I took them apart to replace the gaskets,but found that two manifolds are roted away no gasket surface left. So i need to replace them. Used set or new.
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Old 04-20-2008, 11:44 AM
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Eddie Marine EMI Thunders are probably your best bang for the buck. Stainless Marine makes decent stuff too, might be more $$

Shop around for deals on them.
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Old 04-20-2008, 06:20 PM
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Originally Posted by highroller
They are leaking below elbows. I took them apart to replace the gaskets,but found that two manifolds are roted away no gasket surface left. So i need to replace them. Used set or new.
Bummer. Hiowever, a weld build-up and remachine may still be more cost effective than new. If you have a good machine shop you trust, it may be worth checking into. Loss of base metal at the gasket surfaces does not mean the manifolds are non-useable, repairs can be done.
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Old 04-20-2008, 06:50 PM
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Thanks for all the info I'll check into that also.
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Old 04-20-2008, 06:52 PM
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Gil dry headers!

Exhaust Idle

Last edited by zdek; 04-22-2008 at 09:54 AM.
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Old 04-20-2008, 07:58 PM
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Stainless Marine .
Attached Thumbnails 311 exhaust-img_1997.jpg  
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Old 04-21-2008, 04:00 PM
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Formula 382 nice engine bay.
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Old 04-21-2008, 04:20 PM
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Gotta second Stainless Marine, love mine.
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