ORIGINAL: Tanno
Okay, but all that's doing is replacing the motor. That would then be an "upgraded" X. And this is smart being that the 4.1 is gutless compared to the 4.6. I don't think they are going to "upgrade" anything else on it... that's why the X SS was made.
HPI did some more to it than just replacing the engine. Look over the new truck on their website...it goes over all of the features.
Keep in mind that the X 4.6 RTR is the BASE level Savage, meaning it will not have all of the bells and whistles on it-as you have noticed. The X SS is the PREMIUM level Savage and it will have all the bells and whistles on it.[8D]