It comes stock with 115hp. It is worth keeping if you are interested in tuning a d-series motor. I have seen Dyno plots on an EX and an HX and the only thing that is holding the HX back is the tranny, the gears are so tall. Everytime you shift the HX you are taken out of the powerband. I plan on putting a EX Tranny, Head, IM, and Exhaust system. The breathing on the HX is very restrictive