The part of the car that flanks the sides of the monocoque alongside the driver and runs back to the rear wing, housing the radiators. Found on https://www.encyclo.co.uk/local/22582
Bodywork on the side of the car covering the radiators and engine exhaust. Aids in engine cooling, car aerodynamics and driver protection in the event of a side impact. Found on https://www.indycar.com/Fan-Info/INDYCAR-101/Glossary