Exhaust Manifold bolts

Mystang66

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Jul 23, 2011
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I have a 1977 Mustang II Ghia. I’ve refurbished the original exhaust manifolds that came with the car, but they were off the car when I purchased it and I can’t find the bolts. I’ve searched online and can’t seem to find any info on a bolt kit to fit this. Anyone have info on where I can find these? I believe the bolts holes are 3/8, but the manifold holes are much bigger. It looks like they may need a sleeve of some sort for the bolts to fit.
 
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LILCBRA

I wish I didn't have all of these balls in the air
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I'm pretty sure no one makes a kit specifically for the MII, but exhaust bolts shouldn't be too hard to find. You could order a kit and/or a couple different bolt kits
for an older Mustang or something, match what you actually need and use those. OR..... if it were me, I'd buy the correct size threaded rod, make studs and install the manifolds on them. I'd also use some anti-seize on both the stud itself and the nuts I used. Not necessarily an option if you're looking to keep it original or NOS or anything though....

 

2Blue2

will be trying this sex one when I can find it
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The manifold bolt holes on mine seemed a little big also but I think you need that room because the iron moves around with heat cycles.

1581961476069.png
 

jimbob

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Mar 23, 2009
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hi just noticed your post,i am up against the same thing.my motor motor never had the manifolds on it.so now up against the same problem.did you have any luck finding the bolts.
 

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extra_stout

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@2Blue2 said, that he thinks the bigger bolt holes are needed for heat expansion (exhaust manifold is hotter than cylinder head; manifold will expand more). The diameter/size of the bolt is defined by thread size in the cylinder head and they are the same for all bolts. Just buy bolts in the right length and don't mind about the bigger bolt holes.
You can see on your last picture that the impress of the bolt head has the same diameter on both (small and big bore)...
 
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LILCBRA

I wish I didn't have all of these balls in the air
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I think the link I shared in my post above would be fine.
 
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jimbob

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happy new year every body,hopefully better than the last two.hoping someone can answer another question ,my shifter for my for speed trans.is there suppost to be a gasket,where it bolts down on top.cant remember seeing one.if so would some gasket silicone work.could the transmission oil leak out.thanks
 
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LILCBRA

I wish I didn't have all of these balls in the air
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I don't remember there being a gasket. Honestly, I don't think there would be much of a problem of leakage there either, but a little RTV sealant wouldn't hurt. I know RTV is used on T5 transmissions. :shrug:
 
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jimbob

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ok,good to know.when i bought the car the parts were scatered.the haines book i bought doesnt tell you everything.thanks
 
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Enzio

Dang it. I was hoping mine would get 3 more inches
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I don't remember there being any gasket.
 
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