all head gaskets have the "fire ring". Cutting into the block or head actually defeats the purpose of the seal because the depression in either block or head will only provide the "extra" space for heat to accumulate.
Boost has nothing to do with a head gasket blow either. Compression too high, improper install, and overheating is what you should be worried about if the gasket blows
* I assume your turbo is aftermarket - if you keep blowing gaskets, u should actually consider lowering your compression.
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