Dallara IL-15

The Dallara IL-15 is an open-wheel formula racing car chassis, designed, developed and built by Dallara, and is the current spec-chassis for the one-make Indy NXT spec-series, a feeder series for the IndyCar Series, which has been manufactured since 2015.^[1][2]

Dallara IL-15

Category	Indy NXT
Constructor	Dallara
Predecessor	Dallara IPS
Technical specifications
Chassis	Carbon fiber honeycomb composite monocoque
Length	192 in (4,900 mm)
Width	76 in (1,900 mm)
Engine	Mid-engine, longitudinally mounted, 1,998 cubic centimetres (2.0 litres; 121.9 cubic inches), Mazda-AER P63, I4, turbocharged
Transmission	6-speed semi-automatic sequential
Power	450 horsepower (340 kilowatts; 460 metric horsepower) + 50 hp (37 kW) on push-to-pass 435 pound force-feet (590 newton-metres) + 55 pound force-feet (75 newton-metres) on push-to-pass
Weight	1,400.0 pounds (635.0 kilograms)
Fuel	VP Racing Fuels 102-RON unleaded gasoline
Tyres	Cooper (2015-2022) later Firestone (2023-present)
Competition history
Debut	2015