ferrari took a few upgrades to the first test. the most notable of these was the location of the exit for the air that would have come through the side pod. instead of the traditional place of letting the air out of the rear of the car the sf90 redirected some of the air out behind the base of the halo. this would have 2 advantages, the first would be that by bringing the air up there is would help to generate extra downforce in the middle of the air and the second benefit would be that the sf90 would be able to manipulate the air flow to its rear wing. a second upgrade that ferrari brought to the first test was with the wheel. the wheel rim was redesigned with holes in it to transfer heat away from the tyres thus keeping the tyres in their operating window. although this innovation wouldn't help with the sf90's outright pace it would allow the sf90 to take better care of its tyres therefore improving the cars race pace. after the first week of pre season testing it was the sf90 which had the clear advantage having completed a high number of laps and with both leclerc and vettel commenting how comfortable they felt with the car. although the sf90 finished in 8th and 9th after the first test they only used the harder and therefore slower tyres, when the times were adjusted to show predicted lap time had they all been on the same tyre it was predicted that the sf90 would have been the fastest.