04.5 and up head gaskets are the same except for a small little notch cut out on the side for a dowel pin or something... same bore / thickness etc...

oil pump has changed... the 2005 track / 35th have an oil cooler so my guess is the new oil pump is stronger...

and also the lower intake manifold has changed... i ordered one to see if i can find out the differences between the original and the "Rev-UP" version..