they rate the NOS in itself at 60 shot....but with the intercolling effect it ends up being more! My 19 PSI + NOS feels like it puills quite a bit harder than 25 PSI and it wasn't holding boost untilt he way home! NOS SHOULD and i say SHOULD be worth 550 - 575 rear to me...plus all the additional torque and WHERE the torque is. You may be right on the top end...thats what im curious to see on a dyno sheet!