Very nice set of EAB heads, intended to use them on my last build, but went another direction. these have been soaked in citric acid, then washed so their water jackets are very clean. spark plug threads all very nice, combustion chanbers are very nice. I don't see any pitting, i have not done any cleaning to the chambers except the soaking. These are the best set i've ever had, i think they are very nice shape. ask any questions