On my car i fitted the following:
HPI 75115 - HPI Cyclone Ball Studs, 4.3 x 10.3mm (4)
These go on the steering hubs and the alloy steering plate
HPI 75116 - HPI Cyclone Ball Studs, 4.3 x 13mm, (4)
These go on the outside of the front and rear hubs, and on the front and rear shock towers (you will need 2 packets)
You'll then need 4 x 3mm locknuts for the ballstuds that go on the shock towers
