Article C3.16.5
FSU IB Aperture
Technical Regulations
Article C3.16.5
FSU IB Aperture
Chapter: C3
In Simple Terms
Teams can have up to two small openings (apertures) in the nose and front chassis area for the Fuel System Unit Inlet Box. These openings must fit within specific size dimensions (90mm x 10mm x 30mm) and when viewed from the side, no part of the opening can be more than 100mm away from any other part.
- Maximum of two apertures permitted in the nose and forward chassis
- Apertures must fit within 90mm x 10mm x 30mm dimensional limits
- All points of the aperture must be within 100mm of each other when viewed from the side
- Apertures are specifically for the Fuel System Unit Inlet Box (FSU IB)
Official FIA Text
FSU IB aperture within [90, 10, 30] RV on Nose and Forward Chassis, up to two apertures permitted, viewed from side, no point more than 100mm from any other point.
fsu ib aperturefuel system unitnose aperturechassis openingdimensional regulations
2026 Season Regulations