When changing head gaskets in engines with aluminum heads and steel blocks, don't waste your time with cheep gaskets, they won't hold up. These Fel-Pro gaskets are your best bet, they are designed for mating dissimilar materials and maintaining a seal. Over the years I have done numerous head gasket replacements, trying the cheep gaskets at first, and have come to discover that you have to use a quality head gasket, like the Fel-Pro Permatorque, if you want your work to stick. These are and excellent product at a good price, so spend the money and do it right the first time.