It was refined through 143 CFD-driven simulations, so the shape earns its keep rather than just looking the part. In combined testing with the Diffuser Extension, the pairing cut drag by about 40 newtons, roughly 2.4 percent, and added about 534 newtons of net downforce in a 30 million cell transient model. On the Juniper decklid that translates to steadier tracking and a more planted feel at highway speed.
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