Don't know if posted in right section? Have tried felpro and stock exhaust gaskets on my 57 (283 with headers ), still leak and getting fumes in car. Has got to the point where my wife won't ride in car. Doesn't smell on short runs, only after an hour or so of driving. Have heard of guys cutting flange between exhaust ports, does this help? Anyone recommend a good exhaust gasket. Thx jim
Thx Mark, will see if I can get from the local jobber, have never orderd from summit in the US and my wife thanks you too. If can't get through local jobber will try cross border shopping.
There is probably more than a few good solutions to leaking header flanges, but I think the trick to these gaskets, it that the thick graphite sheet can easily conform to even the most non perfect sealing surfaces.
Once in place, the material seems to be able to conform a little, as the engine heats and cools, thus helping keep even non locking bolts tight.
And the inserts are replaceable if need be.
As a note, if you do go with these, be very careful fitting the inserts into the flange (they come separate), as they are somewhat delicate.
would also suggest a set of "lok" bolts too!!! These have a oval washer & "C" clip that prevents the bolt from 'backing" off. I installed a set on the 51 & have had no problems since that Pete
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Some times I wake up GRUMPY, but today I let her sleep in !!!!!!!!BLACKSTOCK Ont.
I bought Stage 8 locks for my setup, and hadn't installed the lock portion after about 2 months of driving. So I got everything ready to install, checked the bolts and they hadn't moved at all. so I just left them off. Still tight to this day.
If I was to do it again, I'd probably go with the Percy's Vibe Lock SS bolts. More expensive, but much more compact looking.
But regardless of what bolt you use, choose a set with the smallest head, and preferably one that has both Socket head (Allen) and Hex head. Makes them easy to get started in tight quarters.
Cheers and good luck.
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65 Laurentian post, 67 Grande Parisienne 4 door HT.
.....hopefully those gaskets seal it up. I just don't understand why the guys make header flanges that don't seal. It is not rocket science. No gaskets should even be needed, look at the small block manifolds, they never used gaskets and work great. When I built my headers about 25 years ago for the Nailhead I used a seperate flange for each cyl, filed each one nice and flat, shoved the pipe in flush and welded it on the outside not the head side, used no gaskets , allen head bolts with spring washers and have never touched them since, they are perfect. Sure maybe not as pretty with the weld on the outside but they do the job right.
Checked with local suppliers,no go, will order gaskets and bolts from Summit. Only have 1/4" from header to power sterring box and you stated Mark that they have inserts. Do you think I will have to use exhaust cement to hold in place or once they pop into gasket they should stay on there own. Nice job on headers Johnny Ringo. Thx Jim
I guess there is just too much manufacturing variance with a tubular header. Some might be perfect, others way off.
I know my cheap headers have a pretty thin flange, and a not so nicely finished tube end where it comes through. To tell you the truth, that is the real reason I went with a higher end gasket. It all worked out in the end though.
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65 Laurentian post, 67 Grande Parisienne 4 door HT.
Checked with local suppliers,no go, will order gaskets and bolts from Summit. Only have 1/4" from header to power sterring box and you stated Mark that they have inserts. Do you think I will have to use exhaust cement to hold in place or once they pop into gasket they should stay on there own. Nice job on headers Johnny Ringo. Thx Jim
Oh no, they'll keep on their own. They are a very high quality.
I think the link I sent are the ones for all the small standard port SBC. But make sure, there are a few different port shapes.
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65 Laurentian post, 67 Grande Parisienne 4 door HT.