I mean it's pretty good so far but you should introduce tire width upgrades and tire pressure tuning because if you have a rear wheel drive vehicle you would prefer wide back tires thinner front tires and low tire pressure for max grip for the rear tires which is what you want
These should definitely be added into the game, especially since the body kit button in the store is carbon fibre. This is essentially false advertising and misleading as people would spend hundred upon thousands of dollars hoping for one, even though there isn't one. Please add this into the game!