Porsche tested: Test ALUMINED Roof Box - Asphaltkind
Porsche Presents New Aerodynamically-Optimized Roof Box | Carscoops
Thule tests their roof racks to the extreme
Amazon.com: Aerodynamic Car Rooftop Cargo Carrier Bag - Soft Roof Top Luggage Bag for All Vehicles SUV with/Without Rack – Hard Sides - 4 Adjustable Straps – 8 Cubic Feet - Fold Flat Storage Bag : Automotive
Super Duty Jet Wing Aerodynamic Premium Car Roof Rack For Bare or Panoramic Roof Car Top - racktrip.com
Tesla Model 3 with roof-rack box gets much better range if you flip box around | Electrek