The shocks are threaded alloy in a nice dark brown anodised colour.  Losi shocks haven't changed in a good while but these are certainly not out dated by any means.  The shocks come with new alloy threaded adjusters from the BK2 kit, a nice addition. 

The alloy bodies are filled from below and a plastic rebuildable cartridge is screwed in along with the shaft / piston to complete the shock, simple enough and from past experience these shocks work very well, requiring less maintenance than comparable shocks from other companies.

The shock shafts are titanium nitride coated, shiney and gold to you and me, and should last a good while.
The front shocks have a small spring on the shaft inside the body, there is no explanation of this in either manual or its effects nor could I get a real explanation from anyone. The spring acts as a droop limiter so it can be removed for more droop on rough surfaces, it acts as a negative spring pusing up slightly on the piston which would smooth out the rebound to full extension but I'm still not convinced of its full effect.

The shock eyelets screw on to the shafts and were a very tight fit, so much so that one got a little bent out of shape whilst installing.
The  included springs with the car are next to useless in the UK, the most common being silver or green on the front and pink or red on the back depending on track conditions.  Still, the front springs are orange and look cool!

Wheels, Tyres and Foam inserts are supplied in the kit. The wheels are the same as on the XXX4, dish front and rear in flourescent yellow. The style of mounting used is becoming almost a standard in Off Road racing now, interchangable with the Bj4x4, new Yokomo 4wd, X5, Slim4 and others.

A lot of kits dont come with tyres these days for a reason, Losi make their own tyres so I guess it is no great expense for them to include some with the XX4. Needless to say unless you are running on a dirt track in the USA these tyres are good only for practice in a car park somewhere. I would not waste good wheels on the tyres personally and only put them on for the photos. Schumacher mini spikes will go on for the test.

The wheel nuts are bigger than on any other cars I have, so the lack of an included cheap plastic wrench (a la Team Associated) is a shame, I had to use pliars which wasn't a pretty way of doing it.