Most 4age exhaust ports are the same.....
Not too sure about the 100Kw, but read on several occasions that there are only 2 different heads for the 4age 16v, namely small port and big ports... that is intake... the rest should be the same.
The High mounte HKS Turbo manifold was out for a very long time.
I had one about 19 months ago, which I had to sell, as it wouldn't fit in my AW11 MR2. It all looked way too close to
the firewall for my liking, but yes, can be made to fit.
What HKS Turbo manifold are you talking about? What is the URL for it?