recommended 210 upgrades and mods

[hottuna]

The stock ball cups are great, no need to upgrade.
From my experience with lots of training and some races with the 210:

Steering rack is a bit weak, shock towers, at least the rear one tend to give up easily.
Other when that it's a very rigid car that needs no further upgrades.
Don't get tempted to buy all all the "must upgrade parts" you read on the net. The 210 is a very well build car out of the box.