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Discussion Starter #1
why am i finding it so hard to find a std bore 75mm cometic head gasket??

can anyone help me out with a link or something for one?

thanks
 

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Discussion Starter #3
so which head gasket will hold up to 300+whp and 18 lbs of boost with std bore?

anyone know?

thanks
 

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Discussion Starter #5
get a Cometic 75.5mm bore
for a std bore? can you explain in more detail. std bore is 75mm right........

is it safe to do that. i dont want to half ass things when it comes to this, i want to get it right the first time.

thanks for the info by the way.
 

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Front Engine Dragste
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.5mm is not going to a big deal. Its only .020"

They only make 4.060" gaskets for generic small-block fords (stock size 4").
Just remember to have the deck surfaced for the cometics . . .
 

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Discussion Starter #8
.5mm is not going to a big deal. Its only .020"

They only make 4.060" gaskets for generic small-block fords (stock size 4").
Just remember to have the deck surfaced for the cometics . . .
what do you mean surfaced. do you mean milling the top of it to make sure its completely flat?
 

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what do you mean surfaced. do you mean milling the top of it to make sure its completely flat?
yes, its just like running a copper (if they make them for the d . . . ) it has to be within .003 or whatever. Its not just a bolt-on and go with the cometics.
 

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'89 CRX HF
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I thought you had to O-ring your cylinders with a cometic HG ?

Im not sure but I thought I read in a magazine or something that it did not seal well w/o it....

ryan fill us in
no, not at all

Cometics can be used as stock replacements if you wanted. they are actually designed to handle boost better than OEM though...
 
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