For head gaskets (on any vehicle) I only ever buy them from the dealer. A head gasket from napa will probably work...but the one from the dealer will without question last for a long time. Guess it comes down to whether or not saving the $30 or $40 is worth the possibility of having to change it again within the next 50k miles.

86 4runner, pro comp AAL, Kayline Soft top, 31's but all stock