I don't know about it. There have been people on all the other boards as they have closed and reopened and alot of people have checked everywhere and no one makes a turbo kit for a 4.3 except the sy/ty turbo kit. So I wouldn't believe this because no one has been able to find one yet. You might want to see if he has a brochure that says it is made for just the 4.3 v6. Then if it is true go for it. It will give you atleast an additional 100hp.