If you're looking to improve the handling and performance of your car, upgrading your upper control arms is a great way to do it. Upper control arms provide more support for the suspension, which can help reduce body roll and improve cornering grip. They also allow for finer tuning of the suspension geometry, which can lead to improved traction and braking. In short, if you're looking to get the most out of your car's suspension, upgrading to aftermarket upper control arms is definitely worth it.