RE: Avalanche XP
poles, fences, curbs...none of these seems to go well with rc's...lol
Redcat is updating their site and will have parts coming in for the XTR avalanche...which shares most of the same parts. basically i think they just changed the center diff.
Anyway, once they have all the parts for the XTR their may be upgrade parts listed that will work on the XP as well.
But chassis wise, the XP doesnt need much in the way of upgrades. You could always upgrade the motor to some high-end racing engine. As for the pipe, its already a decent tuned pipe and i dont think youll find a pipe that will increase the power much (if any)
You can change the tires/rims for a new look someday.