Underbody Airflow Diagram - Diffuser, Underside Panels & Sump Guard Explained

This document is an annotated schematic illustration showing the underside of a car and how air flows beneath it, with red arrows depicting airflow paths from front to rear. Six labeled callouts explain the aerodynamic and protective features of the underbody. The underside panels allow air to flow in smoothly; they are slightly tilted backward and act as a mini-wing. A gasoline tank shield allows air to travel smoothly. At the rear, a diffuser angles upward and contains complicated passages designed to re-orient turbulent air. A level difference in the floor is created by the rollcage, which as a result pushes air rearward. The chassis is strengthened, and in that process gains a smoother underside. A sump guard protects the engine and transmission, and the holes in it are mandated by regulation. The document contains no year, make, model, part numbers, or specifications — it is purely an educational diagram about underbody aerodynamics, likely relating to a rally or competition car given the mentions of a rollcage, sump guard, and regulation-mandated holes. A reader can learn the purpose of each underbody aerodynamic component and how they work together to manage airflow under the vehicle.