I've seen varied Dynos, but they typically are around 120hp at the wheels with I/H/E combo on them. For the money it takes to do this swap, the gains can't be beat. $200 for the head and between $50-150 for the ecu and various other parts put you in at around $500-600. Remeber though, your gaining 50hp for only $500! If you have the means, I highly suggest it B)