Closing the hood completes Ferrari’s proposed route for extracting air from its front wheel housings. A compressible seal joins each fixed duct to the vent in the panel above it. That connection, detailed in a patent filing discovered by Carmoses, lets the hood remain a usable lid while doing a second job in the car’s aerodynamics.
Nothing in the filing names a specific model. We used the Ferrari 296 Speciale for these renders because its existing hood louvers extract air from the front wheel housings.
Ferrari described that pressure-relief feature when it unveiled the Speciale. The additional detail here is how separate body components can form a continuous air passage without permanently joining the hood to the duct underneath.
The Hood Completes The Passage
Each front wheel housing has an opening through its wall, connected to a duct that ends directly beneath a matching hood vent. Air travels through this enclosed route from the space around the tire to the upper surface of the body. In one specified layout, each duct has exactly one inlet and one outlet, with no additional branches.
The joint between the fixed passage and the moving panel is an elastic gasket running around the outlet. It can attach to the duct’s rim or to the underside of the hood. Lowering the panel compresses the seal between the two surfaces. Opening it separates them again, leaving the passage below in place.
The seal closes the gap where an aerodynamic passage meets a panel that still needs to open. The front compartment can serve as luggage space, although Ferrari also allows for other uses.
Once the hood is shut and the car is moving, the pressure difference does the work. Higher pressure inside the wheel housing drives air toward the lower-pressure region above the hood beside the curved fender. There is no driver-operated vent control described, and no fan or actuator specified for this extraction system.
Three Slots, One Outlet
Two inclined blades divide a single hood opening into three passages. Beneath them, the air comes from one duct. Ferrari also describes versions with different blade counts, so three slots are a particular layout rather than a requirement for the principle to work.
Their direction matters as much as their number. The outlets send air rearward and outward, beyond the sides of the windshield. Ferrari says controlling this heated discharge helps manage its interaction with the airflow supplying radiators farther back in the car.
There is a separate air route on the production Speciale that should not be confused with this one. Its central hood outlet belongs to the aero damper, which connects the front underbody to the upper body. The lateral louvers relieve wheel-housing pressure.
Ferrari’s stated benefit also extends below the car. Reducing wheel-housing pressure lowers the back pressure acting on the front underbody aerodynamic devices. The company says that improves downforce, reduces drag and helps radiator airflow. No measured improvement is supplied for the individual duct-and-seal arrangement.
A Small Joint With A Specific Job
Wheel-arch extraction is established territory among roadgoing track cars. Porsche’s 911 GT3 RS uses louvered openings in its front quarter panels to vent the wheel arches. Ferrari’s contribution here is the construction of a route through an opening hood, including the joint that has to reconnect when the panel closes.
Ferrari quotes approximately 959 pounds of total downforce at 155 mph for the Speciale, a 20 percent increase over the 296 GTB. That belongs to the entire aerodynamic package, including its underbody and rear devices. It cannot be assigned to these vents, and Ferrari has not confirmed that the production car uses this exact seal construction.
The strongest part of this design is its mechanical simplicity. Ferrari describes a connection that separates when the owner opens the front compartment and reforms when it closes, without specifying a powered coupling. That makes the compressible joint a convincing solution to the packaging problem, although the filing gives no separate downforce measurement for the joint.
