Credits: 

ZQrba: Orginal model
https://www.gta5-mods.com/vehicles/subaru-impreza-wrx-sti

DonFelipé: This LAPD WRX 

HOW TO INSTALL:
Open up OpenIV and press the edit buttom.
Then navigate to GTA V/mods/update/x64/dlcpacks/patchdag4ng/dlc.rpf/x64/levels/gta5/vehicles.rpf
Replace police3.yft, polic3_hi.ytd, police3.ytd and police3_hi.yft from the files folder.
Rebuild and enjoy the LAPD WRX STI :)

Make sure to follow me for more mods!
Have a nice day! :)