That is the factory Traxxas Kit for older none LCG Slash convert to LCG....
I bought jor 2 sets... But so lazy to swap.... And bought jor Rally (already LCG) in the mean time....
That kit should be around $350-400 HKD ... Quite good for people with old Slash 4x4 ...
I have installed this kit with my Slash 4x4, the handling is better than original chassis and the design of the center driveshaft is better than the old one.
However, when you play the Slash at rally bumpy dirt land, it may scratch your bottom quite seriously.