The car shown is completely devoid of brake duct fairings, which is either a sign of them not being ready for the launch or that the team didn't want to disclose their design ahead of the pre-season tests.
However, Sauber have gone one stage further, as vortex generators have been placed on both the forward and rearward leg of the upper wishbone to maximize how the airflow moves around that region, reshaping the wake generated by the front tyre that may also be detrimental to the performance of the floor, sidepods and rear wing downstream.
Furthermore, the team have a supplementary cooling inlet above the main one set slightly back down the sidepod  and partially disguised from certain angles by the sidepod slat, which resides in quite a high position over the top of the lowered sidepods leading edge. Although not as large the inlet brings to mind Benetton’s 1989 challenger - the B188, which also sat atop the main sidepod inlet.
The rear wing has been developed slightly when compared to 2017 and is now supported by two pillars, rather than a single one that intersected the exhaust, likely due to trying to save weight and due to the fact that the exhaust must be longer this season.
|The C36 (left) vs the C37 (right) shows how much more detail the new car has over last years.|