[2.5 EJ25D head gasket]

thanks John, no it was not here I heard about the spray or FelPro, up at the parts store someone mentioned it, have there been revisions to the head gaskets, a newer design OEM?, also is there a preferred outlet to get the gaskets, belt and pulleys, one more thing, should I replace main crank seals, or is a complete teardown required for that...lots of questions I know, I appreciate it much

[2.5 EJ25D head gasket]

I've got my heads back from the machine shop, now to buy the best head gasket or a set of gaskets with a suitable head gasket. I heard to use only OEM head gaskets, then I heard to use FelPro, has there been any revisions to the head gaskets that solved the problem of them blowing prematurely, also, is there a recommended sealant like the copper spray, or is reassembly dry better. I'm confused as I have read head gasket jobs were done only to need them in 10,000 miles later, I heard there is an involved method of torquing the head as well, any help is much appreciated...thanks

[98 forester obd codes 2.5 dohc]

new to Subarus and this forum, I just replaced the MAF meter so I'm back and running, two codes left are P0325 and P0400, anything i should know (like where the knock sensor and EGR valve are located is a good start), any methods to test them , thanks