Like cbauto said your compression will get bumped up ever so slightly.
If you havn't bought one yet might wanna look into it, but since your kit comes with a oem one, I would say don't worry about it, from memory a two layer is a 0.09:1 compression bump.

Have a look at that site I posted, you can list you can list your motor specs with head gasket size and it gives a approxamite compression ratio.

Also are you gettin ARP head studs?