APEXi SAFC-II. Will this set-up work? A greddy profec b spec II, a APEXi SAFC-II and a wide band O2 gauge on my B5 S4? Is this stuff compatible?

 

Anyone? is this a bad idea? I have alot of friends in the import tuning buisiness so i got all of this stuff for free. My friends use this set-up on their nissan sr20det engines, evos and other turbo'd japanese cars. They say it will work, but it's not like these guys are proffessionals or audi enthusiasts in any way. So i was just wondering if anyone else has this set-up or anything similar. This stuff is just sittin around my house and if it can safely make me boost more that would be great.

 

I wouldnt do it personally. This isnt a DSM go get it proffesionally tuned