people have done it who can do the work them selves but there is quite a bit of mucking around and you have to build end tanks etc all up cost including buying the cooler probably 400-500 and time spent mucking around I seriously considered going the cheapie option when I did my conversion but I bit the bullet and bought a proper front mount made to fit the gtst and I didn't have to cut my bumper it was worth it.
sorry the pic is b/W Kodak stuffed up a colour pic tomorrow if you want one I can get them they take 2 -3 weeks I'm in melbourne and they cost $1000 they fit with a small extension on the standard pipes
the main link is on my web page
http://meggala.com my turbo upgrade you are better to wait a month or 2 and get the right thing first time I see to many people buy fillin's and the whole project costs double
meggala
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check out my site
http://www.meggala.com
jdm info and drifting stuff
nissan cefiro a31 fitted with
sr20 and trust t518z turbo.
13.3 @ 105.69 mph 2.069 60'
full street trim