I've been thinking about it for a while and finally decided to share the idea to see what people think abouti it.
I've been making downpipes for few years and somehow there still is some interest. It would be good, if there was an option to supply full system, so all we need is cat back system. The hardest bit is, that apparently there are few different options depending on pfl, fl, Legnum, Galant. Put me straight if I'm wrong. Other thing is, that the best way to do it would be to build the exhaust on the actual car, but as we know, because of distance, spread of all of VR4 drivers all over UK, Europe and further it simply wouldn't be possible. The best option is to supply ready kit just like the downpipe, which could be a little bit tricky because location of tailpipe in a rear bumper is very crucial.
Other unknown important aspects are price and what would people prefer: straight through pipe with back box, resonated pipe (how many resonators) with back box and other options.
Another thing is, that I may be waisting my time, because there are already options out there which would be simply cheaper.
Please share your thoughts on this subject.