Cylinder heads get a lot of credit when it comes to engine power. Here at Jalopnik, we've touted the Chevy double hump heads' ability to shape small block V8 power and late-90s Vortec heads' status as ...

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There are plenty of instances where perfectly good—and often rare—cast iron cylinder head and engine block castings are scrapped due to the presence of a hairline crack in an external surface. Often ...