I had the combo downpipe/testpipe on my Z for a while. The downpipes fit with no problem at all, but the drivers side test pipe was about 1/2" to 3/4" too short to work properly. I ended up getting a different set of testpipes to make it work. I can say that the materials held up well over the years and very little rust was seen on the downpipes. From previous posts and in my experience it will be a hit or miss. You are taking a gamble on fit, but if you get a set that does fit correctly I will say they are a cheap, but somewhat reliable workaround if you need it.