I thought I'd post up the graph for my 592xp its a 2022 serial number saw, I've seen other dyno tests of the 592 and all of them put out 8.4-8.6hp stock, you can see mine got to only right about 8hp.. but now being ported by Joe at HMWF it pulled 9.29hp and 6.11tq (an increase of 16.416% for HP and 14.42% for TQ)