The XF5 GTR is a track only variant of the XF5, it is not street legal because it's too cool for da streetz.
It's naturally aspirated engine making 3500 Horsepower, RWD, Massive wing on the back, Active canards vents on the front, and an additional boost from the exhaust makes this car a track monster.
The active front canard vents thing closes when it hits around 550 km/h (341 mph) to improve aerodynamics of the car.
Unlike it's other siblings, this one is naturally aspirated, but that doesn't mean it's not good. This thing can rip through Gold Prix in 24 Seconds! That's incredibly quick if u ask me.

Road legal Roadster version ; https://www.simpleplanes.com/a/yDxllF/Allundra-XF5-GTR-Roadster

Gold Prix run and Acceleration/Top speed showcase : https://youtu.be/LaSMogOEuRU

Performance :
3500 horsepower
Top speed of 727 Km/h (451 Mph)
0-100 Km/h (60 Mph) in 0.3 second
Top speed to 0 in about 2 seconds
Absolutely insane handling

Controls :
Pitch - Accelerate
Roll - Turn
Brakes - Brakes obviously
AG1 - Headlights
AG3 - Interior Lights
AG4 - Canopy
AG8 - Engine