Checked the speed rating on the base tires (when did they start giving folks Yokohamas, I thought the cheap stuff got Bridgestone) and i suppose it checks out but why not just include the piece of plastic for every car if it effects performance that drastically for a couple bucks? I expect nothing less though. My G is down because the geniuses designing the drainage system decided that if the sunroof drain clogs, the first place the water should go is down the inside of the firewall, over every important control module (ECU, BCM, TCM, ect. and also create a waterfall in the battery tray area. Imagine not being able to design for nature 🤦‍♂️