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Hooker Headers bolts
#1
I just bought a pair of used but in fact brand new Hooker Headers (the black ones which I believe are the Comp ones).
Now I want to install them but I need to get some bolts to connect the headers to the heads (2V), 8 by side (total 16). Those were not included.

I have the stock exhaust manifolds right now but I can't use the original bolts with the new headers, they're too long.

Which bolts do I need ? Where can I find them ?
Thanks !
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#2
Call Summit or Jegs. You can get the header bolts there, or if you have a speed shop near you you can get them there.
Jim

drive it like you stole it
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#3
Sly_drums;41282 Wrote:I just bought a pair of used but in fact brand new Hooker Headers (the black ones which I believe are the Comp ones).
Now I want to install them but I need to get some bolts to connect the headers to the heads (2V), 8 by side (total 16). Those were not included.

I have the stock exhaust manifolds right now but I can't use the original bolts with the new headers, they're too long.

Which bolts do I need ? Where can I find them ?
Thanks !
You can go down to your local parts store, Oriely's, NAPA, etc....they will have them in stock.Most of the time you will find then in the "Mr. Gasket" brand.


[Image: 16kuyc0.jpg]
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#4
These should do the trick.
This is the size you want: 3/8"-16 x 3/4" Mr. Gasket# 918A
For Ford v8 engines.
You can also go to any Nut and Bolt specialty shop and get them in Grade 8
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#5
I think those are american bolts, I'm in France and I guess no one here has them in stock unfortunately Sad
What is grade 8 ?
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#6
Sly_drums;41299 Wrote:I think those are american bolts, I'm in France and I guess no one here has them in stock unfortunately Sad
What is grade 8 ?
You might try here. Chuck http://www.holley.com/dealers/Internatio...ocator.asp
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#7
Sly_drums;41299 Wrote:I think those are american bolts, I'm in France and I guess no one here has them in stock unfortunately Sad
What is grade 8 ?

Grade 8 is the strength of the bolt. Mark’s Standard Handbook for Mechanical Engineers lists Grade 5 fasteners as 120 ksi fasteners. This means the tensile strength is 120,000 lbs per square inch. It also lists Grade 8’s as 150 ksi fasteners meaning the tensile strength is 150,000 lbs per square inch. Our cars more than likely came with Grade 5 bolts, but I like to use Grade 8 for headers only because I have a tendency to snap bolts and don't have the patience to extract them. Your local parts store should have them or be able to get them for you. If not, try a local repair shop that specializes in American cars. Ebay?
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#8
FasTnNefariouS;41322 Wrote:
Sly_drums;41299 Wrote:I think those are american bolts, I'm in France and I guess no one here has them in stock unfortunately Sad
What is grade 8 ?

Grade 8 is the strength of the bolt. Mark’s Standard Handbook for Mechanical Engineers lists Grade 5 fasteners as 120 ksi fasteners. This means the tensile strength is 120,000 lbs per square inch. It also lists Grade 8’s as 150 ksi fasteners meaning the tensile strength is 150,000 lbs per square inch. Our cars more than likely came with Grade 5 bolts, but I like to use Grade 8 for headers only because I have a tendency to snap bolts and don't have the patience to extract them. Your local parts store should have them or be able to get them for you. If not, try a local repair shop that specializes in American cars. Ebay?

If you have a 351 cleveland engine you need 3/8 diameter coarse thread x 1 inch long header bolts, not 3/4 as shown above and in most application listings including Summit. I just went to the garage and measured some. the 3/4 long ones will only engage 2-3 threads and surely strip out.
Any of these will work, and surely you might find them locally.
http://www.summitracing.com/search/Part-...ader+bolts
I am not sure of the other v-8 lengths

[Image: mustangnight010.jpg]
1972 Mustang Convertible 351C 4V
1966 Ford Galaxie 7 litre-4speed

Jorge
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#9
And whatever you do, be sure to retorque after they get up to temp. They loosen quickly and often when new.

[Image: 2rr7aiv.png]

Just cruising along minding our own business when BAM!!! The LAWS show up.
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#10
I second Jorgem2's opinion on the length of bolts for the Clevelands.

72 Q Code Mach 1, 351C, Toploader.
69 Torino GT Convertible, 351W, FMX
03 Anniversary Harley Davidson
31 Deluxe Tudor
91 F350 Lariet Crewcab 4x4, 460, automatic
2012 Escape 4x4
92 Feature Edition Mustang
82 F100 Shortbed
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