I'm taking a punt that the top half of the manifold would fit, but the section from the collector thru to the cat is useless in a ST162 - the crossmembers are too different to the ST202.
Looks hot man, I may be interested - where are you located? Are you negotiable on price? And just for the record, they wont fit anything other than a gen 3 as the ports are bigger and the studs are a different layout to any other S series engine.