Looking to get a head gasket and I know my block was bored, .20 over should I get the 85 or 86mm bore head gasket??


Cometic Headgasket,
1.29mm Thick 85mm Bore cgC4157-051


Cometic Headgasket,
1.29mm Thick 86mm Bore cgC4156-051

i bored mine .5 over with weisco pistons and oliver at slowboy recommended that i use and 86mm gasket.
i went with cosworth btw

hope that helps

dont use cometic

Why not?

i believe that the cometic head gaskit is actually weaker that the oem one. a part like that i wouldnt mind spanding alot of money and buying what the best is just to be safe. i believe its only 50 more for a better one anyway.

search

use OEM or cosworth

Yeah do a search...there are a lot of people putting down SERIOUS power on the OEM MLS head gasket.

DIDYSIS i have a brand new oem metal head gasket, its yours for cheap if you want it (if you determine stock 85mm will work for you)

and i mean the cosworth really isnt that much more $, quality peice, and kind of gives you the peice of mind that you wot have to worry about it in the future.

Here, 1mm= roughly, .040. you bored .020.. don't think you need 86mm.

oem bro!

Use a 86mm cosworth gasket.

Anyone knows a "cheap" source for 86mm cosworth HG? :}

I have a Cometic headgasket and have zero issues with it. If you are bored over I would think you do a 86mm.

I went with the theory if Cometic was a good choice for older 4g63's why wouldn't it be for newer ones. I had lots of friends use them with no trouble. I really don't believe a headgasket like an HKS or anything will be built 200+ dollars differently then a OEM or more affordable brand.

We have them in stock if you need one.

Call the vendor above you.