You need bearings for the front axles, the rear axles and the gearbox. Paradoxically the steering is ballraced already.
B4 Bearings won't fit.
The B4 shell can be made to fit but the Kyosho RB-5 shells are a better fit.
I've got a Madrat and the only thing you really need for it are other shocks and the better motor plate as the original one is made of cheese and bends badly. I fitted Associated B4 front steering arms and axles to be able to fit B4 front wheel and the kit axles fit B4 rims if you remove the hex adapter.
The car is actually really good with a bit of work!
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