your list is good.

but re use the stock head to header gaskets. use the cat back gasket that comes with the headers. buy 2 new nuts and bolts for the cat back flange as its likely to break or strip and then need to be cut off. not sure if the headers come with them 2 bolts or not.

i highly recommend a ratcheting box wrench, 13 mm for the manifold bolts in the heads. sockets dont fit well to the nuts or bolts there. but the ratcheting wrench fits like a glove.