Originally Posted by DRONE
The HP shock is about 5 cm longer than the XC air shock. Otherwise, I think it fits OK. Some guys have seen some tire rubbing with the XC shock so that would be something to keep your eye on. The valve where you add or bleed air is in a different place on the HP shock. I don't know if that would make adjusting the air pressure easier, harder, impossible, or what.
Did you find a new bike already ?