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civicskata
10-16-2006, 12:58 PM
Getting ready to throw on my spare head and double checking the proper headgasket size to use, i'm picking up a cometic gasket so it'll help me sleep better at night, but the 75.5MM Bore - MLS .030 is the one i need for non-bored cylinders, correct?
civic97
10-16-2006, 01:59 PM
No 75.5 is a .020 bore. 75 is stock. i rock a cometic one but there is no need stock ones are just fine.
lowbuck
10-16-2006, 02:03 PM
Stock is tough to beat for most maintenance type items. My stock head gasket has 220k and climbing. Not many aftermarket parts last half that.
civicskata
10-16-2006, 02:25 PM
yeah, i was guessing that 75 is stock but i guess cometic doesnt offer one, the head is milled and ported, and when the time comes gettin stage 2 cam, so wanted to make sure it would hold, but also gettin arp headstuds, so maybe that would be double insurance with a cometic if i could find one
ryan89crx
10-16-2006, 05:29 PM
No 75.5 is a .020 bore. 75 is stock. i rock a cometic one but there is no need stock ones are just fine.Cometic only makes them in 75.5mm and up. i believe the real diameter of stock HGs are the same

im running the 75.5mm Cometic on my stock bore and it works great!
RandysSOHC
10-16-2006, 06:02 PM
the z6 engine I'm building is bored .020 over (75.5mm)
so I guess the TT 75.5mm HG was the one I was aiming for....