LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Header collector gasket choice?

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Old Apr 23, 2012 | 03:53 PM
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Default Header collector gasket choice?

Too much exhaust is getting in the car when I run the heat during a stop. I need better collector gaskets. What do you recommend? Felpro? Mr. Gasket?

Any of these good for a tight seal?
Mr. Gasket
Felpro
Percy's

Last edited by Rob94hawk; Apr 23, 2012 at 04:20 PM.
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Old Apr 23, 2012 | 04:45 PM
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I run dead soft aluminum gaskets, but they do leak, however I do not care because they don't leave any mess if I'm taking the y-pipe out.
Are you absolutely sure, without a doubt, posolutely, one-hundred percent sure your headers are not leaking?
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Old Apr 23, 2012 | 06:06 PM
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I run the Felpro 2001 on my manual cutout cap. They work great and come right off without ripping when I open the cutout. You have to keep snugging them up like header gaskets til they take a set.
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Old Apr 23, 2012 | 08:33 PM
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On my collectors I use copper, then for my cutouts the gaskets that came with them.
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Old Apr 23, 2012 | 08:43 PM
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When I had hookers, mr.gaskets and a tube of rtv.
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Old Apr 24, 2012 | 09:11 AM
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Percy dead soft aluminum gaskets. At worst they might barely leak but wont burn or blow out.
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Old Apr 24, 2012 | 09:48 AM
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You sure the collectors are leaking? It would have to be a hell of a leak for you to smell it, chances are it's just the wind blowing the fumes back into your car. Sitting at stoplights or in traffic with a tail wind sucks.
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Old Apr 24, 2012 | 03:54 PM
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The smell is real strong when I'm at a stop and I have the windows open. The header bolts are on at tight as I can get them. I was thinking that the #1 primary tube is leaking since I never put any gasket sealer on but I doubt all the fumes are coming from that one primary.

The SLP tailpipes are on the driver side and I have no cats so it could be possible it could all be wafting in from the rear. I just hate reaking of fuel every time I drive and have the windows open or use the heat.

I was thinking of getting on of those cheap CO detectors and placing it near all the pipes to maybe get a general idea what's leaking if anything at all.
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Old Apr 24, 2012 | 04:19 PM
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They kept blowing on me; I cut the flanges off, welded on a section of swolen tube and made a slip fit with 3" wide band clamps.
Have not had an issue (clearance or leaks) since
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Old Apr 24, 2012 | 08:57 PM
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Try Remflex gaskets.
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Old Apr 25, 2012 | 02:59 PM
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I had a header gasket leak that only Earl's pressure master graphite foil gasket could fix....apparently they really do seal 1200% better as advertised lol. Nicest gaskets I've ever seen....they make high quality collector gaskets too worth taking a look at:

http://www.jegs.com/i/Earl%26%23039%...9D10Z/10002/-1
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Old Apr 26, 2012 | 10:27 AM
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I had a header gasket leak that only Earl's pressure master graphite foil gasket could fix....apparently they really do seal 1200% better as advertised lol. Nicest gaskets I've ever seen....they make high quality collector gaskets too worth taking a look at:
That's what I use and have never had a leak.
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Old Oct 13, 2012 | 11:41 PM
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Originally Posted by ahritchie
I had a header gasket leak that only Earl's pressure master graphite foil gasket could fix....apparently they really do seal 1200% better as advertised lol. Nicest gaskets I've ever seen....they make high quality collector gaskets too worth taking a look at:

http://www.jegs.com/i/Earl%26%23039%...9D10Z/10002/-1
I just got these from Summit today and it says on the back of the package "Not for use with flange on flange." Apparently they're for slip fit flanges only. Don't recall it saying that on Summit. I'll check again when Summit's website is back up.
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Old Oct 28, 2012 | 01:26 AM
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I'll have to try these Remflex gaskets:

http://catalog.remflex.com/COLLECTOR...ket_p/8002.htm
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Old Oct 28, 2012 | 01:31 AM
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I have pretty much converted to slip connectors and Stainless band clamps. more ground clearance and better seal
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Old Oct 28, 2012 | 02:56 AM
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Originally Posted by TwoFast4Lv
I have pretty much converted to slip connectors and Stainless band clamps. more ground clearance and better seal
Is there a way to do this with the existing y pipe?

I'll try the 30 dollar gaskets first though.
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