Originally Posted by abdr500
right ok they are normaly good the cometic gasket but you have to have the head skimed and the block has to be flat other wise they will leak
Spot on in my experience.
Have used 5 of them

in five years of Cossie ownership, at varying power levels, all use was ABUSE. Never had one fail. I've easily done 40000 miles in my car, many on track or at full boost
Recommended as far as I'm concerned, just make sure they're well fitted!
Si