I have a pair of genuine Specialty-Z 2.5" stainless steel super-split downpipes for sale. Asking $275.00, plus shipping.
These downpipes are in great condition and barely used. (They still sell for > $450 brand new). They have only been used for approximately ~10,000 km (~6200 miles).
I bought them off a fellow local Z club and tt.net member (Mixmanmash) when he upgraded to 5-bolt turbos. I intended to install them on my car but I ended up buying 5-bolt turbos as well and never got around to even installing them on my car.