Looks like someone else finally did some searching.....I came upon ITS while looking to upgrade the turbo on my Eclipse. I saw that they had a kit available (or soon to be coming out on their site). So I e-mailed them for specs, I didn't get much other than this

ITS said -
we use a bar and plate IC
and the turbo depends on what stage we use turbonetics

(in reference to piping and headers) we use mild steel and ceramic coat inside and out
this will last longer and have less chance of cracking than stainless.

Hmmmmm lets see, have any of you heard of SS pipe cracking, I for one haven't . I myself would go with SF since it is proven and what you get with the kit makes the $5K worth it.

This is my own thoughts on the subject.....you guys can add whatever you want.