Re: 16v Exhaust Manifold Fit '84 GTi? (jstover)
I don't think you can.
I had a scirocco 16V downpipe next to a rabbit downpipe and the scirocco was much longer. Also, the scirocco one has a curve while the rabbit one was straight.
The exhaust manifold you might be able to use, but notice that ncvwnut said he had to have a staright pipe fabricated".
You should be better off trying to find the rabbit manifold and downpipe, they are always popping up in the classifieds.