Instalation is pretty simple !
Simply drop the vehicles folder here

GTAV/menyoostuff/vehicles

You find the vehicle in :

spawn vehicle > saved vehicles > F1 Minivan 

spawn vehicle > saved vehicles > Neon F1 

spawn vehicle > saved vehicles > F1 Grotti

spawn vehicle > saved vehicles > Undercover F1 Car

spawn vehicle > saved vehicles > Duke F1

Thank you for downloading.