Cometic Head Gasket Vs Other Brands?

[sky30]

Ive noticed cometic mls headgaskets are fair bit cheaper than other brands likevtomei and hks.

Are they still a good reliable gasket?

Or a waste of money

[Pridenjoy]

Imo the cometic is just as good as tomei ect. All comes down to surface finish with a mls head gasket, if the block hasn't been machined genuine is the way to go.

[scotty nm35]

I got one in the Cometic MLS kit when I built the 4g63, I was advised not to bother and run the Tomei instead. Depends how hard you plan to lean on it I guess. MLS head gaskets require a very smooth mating surface on both block and head if it hasn't been decked yet.

More important is upgrading to decent head studs imo, but they don't make L19/625+ for the RB afaik.

[GTRPSI]

L19 12mm or 1/2" studs can be used on RB's, nothing a drill and tap cannot fix.

Tomei head gaskets are proven to hold well......

[sky30]

So are cometic prone to failing more so than other mls gaskets?

My block has been decked.

Edited February 13, 2015 by sky30

[jet_r31]

I got one in the Cometic MLS kit when I built the 4g63, I was advised not to bother and run the Tomei instead. Depends how hard you plan to lean on it I guess. MLS head gaskets require a very smooth mating surface on both block and head if it hasn't been decked yet.

More important is upgrading to decent head studs imo, but they don't make L19/625+ for the RB afaik.

they make the l19 and ca625 in a 12mm rb26 size, so you just tap it out

cheers

darren

[Dasmbo]

I have had 1.2mm Cometic head gasket on my engine since my rebuild also have ARP head studs. I also had block and head machined running up to 19psi boost at 300+kw no problem. I would recommend the use of head studs with the gasket better clamping pressure between head and block.