its on my rb26, i got a dyno graph but its at the parents place.. its relly responsive, full boost at 3200, but still has good top end pull, 111mph over the quater on 16psi. Holset are a great turbo as far as im concerend, duno what else to say realy, the power figure im making with it is in the add, it has characteristics that of a turbo slightly smaller then a gt3582. but spools much louder! would be ideal for any 20,25, or 26, the high mount manifold its on in the photos were when i first brought it, it was going to go on my vl that had a rb25 in it, but then i sold the car and got a gtr, but i didnt like the lag that the big hks had, so i put the holset on (as per photo). Hope that helps