BIPLANE WING
The lower element is designed to work in conjunction with the underbody.
It has a curved profile to accept the downwash from the rear fenders. This setup will produce more overall downforce with less drag than a single element. 

The new engine cover has a more streamlined shape around the engine and rear wheels. The trailing edge is designed to work in conjunction with the biplane structure. This setup reduces drag for more top speed. The engine cover comes in carbon fiber or E-glass.